lib/string_choices: Add str_assert_deassert() helper

Add str_assert_deassert() helper to return "assert" or "deassert"
string literal depending on the boolean argument. Also add the
inversed variant str_deassert_assert().

Suggested-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Link: https://lore.kernel.org/r/20250923095229.2149740-1-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Kees Cook <kees@kernel.org>

include/linux/string_choices.h

@@ -17,6 +17,12 @@
 
 #include <linux/types.h>
 
+static inline const char *str_assert_deassert(bool v)
+{
+	return v ? "assert" : "deassert";
+}
+#define str_deassert_assert(v)		str_assert_deassert(!(v))
+
 static inline const char *str_enable_disable(bool v)
 {
 	return v ? "enable" : "disable";