drm/amdgpu: Change amdgpu_ras_block_late_init_default function scope

Turn previously global function into a static function to avoid the
following Clang warning:

drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c:2459:5: warning: no previous prototype
for function 'amdgpu_ras_block_late_init_default' [-Wmissing-prototypes]
int amdgpu_ras_block_late_init_default(struct amdgpu_device *adev,
    ^
drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c:2459:1: note: declare 'static' if the
function is not intended to be used outside of this translation unit
int amdgpu_ras_block_late_init_default(struct amdgpu_device *adev,
^
static
Signed-off-by: NMaíra Canal <maira.canal@usp.br>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c

@@ -2456,7 +2456,7 @@ int amdgpu_ras_block_late_init(struct amdgpu_device *adev,
 	return r;
 }
 
-int amdgpu_ras_block_late_init_default(struct amdgpu_device *adev,
+static int amdgpu_ras_block_late_init_default(struct amdgpu_device *adev,
 			 struct ras_common_if *ras_block)
 {
 	return amdgpu_ras_block_late_init(adev, ras_block);