gpu: nova: replace `kernel::c_str!` with C-Strings

C-String literals were added in Rust 1.77. Replace instances of
`kernel::c_str!` with C-String literals where possible.

Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Benno Lossin <lossin@kernel.org>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Tamir Duberstein <tamird@gmail.com>
Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com>
Link: https://patch.msgid.link/20251222-cstr-nova-v1-1-0e2353d5debe@gmail.com
[ Use 'nova' commit subject prefix; use kernel vertical import style.
  - Danilo ]
Signed-off-by: Danilo Krummrich <dakr@kernel.org>

drivers/gpu/drm/nova/driver.rs

@@ -1,7 +1,15 @@
 // SPDX-License-Identifier: GPL-2.0
 
 use kernel::{
-    auxiliary, c_str, device::Core, drm, drm::gem, drm::ioctl, prelude::*, sync::aref::ARef,
+    auxiliary,
+    device::Core,
+    drm::{
+        self,
+        gem,
+        ioctl, //
+    },
+    prelude::*,
+    sync::aref::ARef, //
 };
 
 use crate::file::File;
@@ -24,12 +32,12 @@ const INFO: drm::DriverInfo = drm::DriverInfo {
     major: 0,
     minor: 0,
     patchlevel: 0,
-    name: c_str!("nova"),
-    desc: c_str!("Nvidia Graphics"),
+    name: c"nova",
+    desc: c"Nvidia Graphics",
 };
 
-const NOVA_CORE_MODULE_NAME: &CStr = c_str!("NovaCore");
-const AUXILIARY_NAME: &CStr = c_str!("nova-drm");
+const NOVA_CORE_MODULE_NAME: &CStr = c"NovaCore";
+const AUXILIARY_NAME: &CStr = c"nova-drm";
 
 kernel::auxiliary_device_table!(
     AUX_TABLE,

drivers/gpu/nova-core/driver.rs

@@ -2,7 +2,6 @@
 
 use kernel::{
     auxiliary,
-    c_str,
     device::Core,
     devres::Devres,
     dma::Device,
@@ -82,7 +81,7 @@ impl pci::Driver for NovaCore {
             unsafe { pdev.dma_set_mask_and_coherent(DmaMask::new::<GPU_DMA_BITS>())? };
 
             let bar = Arc::pin_init(
-                pdev.iomap_region_sized::<BAR0_SIZE>(0, c_str!("nova-core/bar0")),
+                pdev.iomap_region_sized::<BAR0_SIZE>(0, c"nova-core/bar0"),
                 GFP_KERNEL,
             )?;
 
@@ -90,7 +89,7 @@ impl pci::Driver for NovaCore {
                 gpu <- Gpu::new(pdev, bar.clone(), bar.access(pdev.as_ref())?),
                 _reg <- auxiliary::Registration::new(
                     pdev.as_ref(),
-                    c_str!("nova-drm"),
+                    c"nova-drm",
                     0, // TODO[XARR]: Once it lands, use XArray; for now we don't use the ID.
                     crate::MODULE_NAME
                 ),