crypto: lib/chacha - remove INTERNAL symbol and selection of CRYPTO

Now that the architecture-optimized ChaCha kconfig symbols are defined
regardless of CRYPTO, there is no need for CRYPTO_LIB_CHACHA to select
CRYPTO.  So, remove that.  This makes the indirection through the
CRYPTO_LIB_CHACHA_INTERNAL symbol unnecessary, so get rid of that and
just use CRYPTO_LIB_CHACHA directly.  Finally, make the fallback to the
generic implementation use a default value instead of a select; this
makes it consistent with how the arch-optimized code gets enabled and
also with how CRYPTO_LIB_BLAKE2S_GENERIC gets enabled.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

arch/arm/lib/crypto/Kconfig

@@ -15,7 +15,7 @@ config CRYPTO_BLAKE2S_ARM
 
 config CRYPTO_CHACHA20_NEON
 	tristate
-	default CRYPTO_LIB_CHACHA_INTERNAL
+	default CRYPTO_LIB_CHACHA
 	select CRYPTO_ARCH_HAVE_LIB_CHACHA
 
 config CRYPTO_POLY1305_ARM

arch/arm64/lib/crypto/Kconfig

@@ -3,7 +3,7 @@
 config CRYPTO_CHACHA20_NEON
 	tristate
 	depends on KERNEL_MODE_NEON
-	default CRYPTO_LIB_CHACHA_INTERNAL
+	default CRYPTO_LIB_CHACHA
 	select CRYPTO_LIB_CHACHA_GENERIC
 	select CRYPTO_ARCH_HAVE_LIB_CHACHA
 

arch/mips/lib/crypto/Kconfig

@@ -3,7 +3,7 @@
 config CRYPTO_CHACHA_MIPS
 	tristate
 	depends on CPU_MIPS32_R2
-	default CRYPTO_LIB_CHACHA_INTERNAL
+	default CRYPTO_LIB_CHACHA
 	select CRYPTO_ARCH_HAVE_LIB_CHACHA
 
 config CRYPTO_POLY1305_MIPS

arch/powerpc/lib/crypto/Kconfig

@@ -3,7 +3,7 @@
 config CRYPTO_CHACHA20_P10
 	tristate
 	depends on PPC64 && CPU_LITTLE_ENDIAN && VSX
-	default CRYPTO_LIB_CHACHA_INTERNAL
+	default CRYPTO_LIB_CHACHA
 	select CRYPTO_LIB_CHACHA_GENERIC
 	select CRYPTO_ARCH_HAVE_LIB_CHACHA
 

arch/riscv/lib/crypto/Kconfig

@@ -3,6 +3,6 @@
 config CRYPTO_CHACHA_RISCV64
 	tristate
 	depends on 64BIT && RISCV_ISA_V && TOOLCHAIN_HAS_VECTOR_CRYPTO
-	default CRYPTO_LIB_CHACHA_INTERNAL
+	default CRYPTO_LIB_CHACHA
 	select CRYPTO_ARCH_HAVE_LIB_CHACHA
 	select CRYPTO_LIB_CHACHA_GENERIC

arch/s390/lib/crypto/Kconfig

@@ -2,6 +2,6 @@
 
 config CRYPTO_CHACHA_S390
 	tristate
-	default CRYPTO_LIB_CHACHA_INTERNAL
+	default CRYPTO_LIB_CHACHA
 	select CRYPTO_LIB_CHACHA_GENERIC
 	select CRYPTO_ARCH_HAVE_LIB_CHACHA

arch/x86/lib/crypto/Kconfig

@@ -15,7 +15,7 @@ config CRYPTO_BLAKE2S_X86
 config CRYPTO_CHACHA20_X86_64
 	tristate
 	depends on 64BIT
-	default CRYPTO_LIB_CHACHA_INTERNAL
+	default CRYPTO_LIB_CHACHA
 	select CRYPTO_LIB_CHACHA_GENERIC
 	select CRYPTO_ARCH_HAVE_LIB_CHACHA
 

crypto/Kconfig

@@ -634,8 +634,8 @@ config CRYPTO_ARC4
 
 config CRYPTO_CHACHA20
 	tristate "ChaCha"
+	select CRYPTO_LIB_CHACHA
 	select CRYPTO_LIB_CHACHA_GENERIC
-	select CRYPTO_LIB_CHACHA_INTERNAL
 	select CRYPTO_SKCIPHER
 	help
 	  The ChaCha20, XChaCha20, and XChaCha12 stream cipher algorithms

lib/crypto/Kconfig

@@ -50,22 +50,16 @@ config CRYPTO_ARCH_HAVE_LIB_CHACHA
 
 config CRYPTO_LIB_CHACHA_GENERIC
 	tristate
+	default CRYPTO_LIB_CHACHA if !CRYPTO_ARCH_HAVE_LIB_CHACHA
 	select CRYPTO_LIB_UTILS
 	help
-	  This symbol can be depended upon by arch implementations of the
-	  ChaCha library interface that require the generic code as a
-	  fallback, e.g., for SIMD implementations. If no arch specific
-	  implementation is enabled, this implementation serves the users
-	  of CRYPTO_LIB_CHACHA.
-
-config CRYPTO_LIB_CHACHA_INTERNAL
-	tristate
-	select CRYPTO_LIB_CHACHA_GENERIC if CRYPTO_ARCH_HAVE_LIB_CHACHA=n
+	  This symbol can be selected by arch implementations of the ChaCha
+	  library interface that require the generic code as a fallback, e.g.,
+	  for SIMD implementations. If no arch specific implementation is
+	  enabled, this implementation serves the users of CRYPTO_LIB_CHACHA.
 
 config CRYPTO_LIB_CHACHA
 	tristate
-	select CRYPTO
-	select CRYPTO_LIB_CHACHA_INTERNAL
 	help
 	  Enable the ChaCha library interface. This interface may be fulfilled
 	  by either the generic implementation or an arch-specific one, if one