drm/amdkfd: mark local functions as static

The file was newly added and causes some -Wmissing-prototype warnings:

drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gc_9_4_3.c:57:5: error: no previous prototype for 'kgd_gfx_v9_4_3_hqd_sdma_load' [-Werror=missing-prototypes]
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gc_9_4_3.c:126:5: error: no previous prototype for 'kgd_gfx_v9_4_3_hqd_sdma_dump' [-Werror=missing-prototypes]
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gc_9_4_3.c:163:6: error: no previous prototype for 'kgd_gfx_v9_4_3_hqd_sdma_is_occupied' [-Werror=missing-prototypes]
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gc_9_4_3.c:181:5: error: no previous prototype for 'kgd_gfx_v9_4_3_hqd_sdma_destroy' [-Werror=missing-prototypes]

Mark these all as 'static' since there are no outside callers.

Fixes: a805889a ("drm/amdkfd: Update SDMA queue management for GFX9.4.3")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gc_9_4_3.c

@@ -54,7 +54,7 @@ static uint32_t get_sdma_rlc_reg_offset(struct amdgpu_device *adev,
 	return retval;
 }
 
-int kgd_gfx_v9_4_3_hqd_sdma_load(struct amdgpu_device *adev, void *mqd,
+static int kgd_gfx_v9_4_3_hqd_sdma_load(struct amdgpu_device *adev, void *mqd,
 				 uint32_t __user *wptr, struct mm_struct *mm)
 {
 	struct v9_sdma_mqd *m;
@@ -123,7 +123,7 @@ int kgd_gfx_v9_4_3_hqd_sdma_load(struct amdgpu_device *adev, void *mqd,
 	return 0;
 }
 
-int kgd_gfx_v9_4_3_hqd_sdma_dump(struct amdgpu_device *adev,
+static int kgd_gfx_v9_4_3_hqd_sdma_dump(struct amdgpu_device *adev,
 				 uint32_t engine_id, uint32_t queue_id,
 				 uint32_t (**dump)[2], uint32_t *n_regs)
 {
@@ -160,7 +160,7 @@ int kgd_gfx_v9_4_3_hqd_sdma_dump(struct amdgpu_device *adev,
 	return 0;
 }
 
-bool kgd_gfx_v9_4_3_hqd_sdma_is_occupied(struct amdgpu_device *adev, void *mqd)
+static bool kgd_gfx_v9_4_3_hqd_sdma_is_occupied(struct amdgpu_device *adev, void *mqd)
 {
 	struct v9_sdma_mqd *m;
 	uint32_t sdma_rlc_reg_offset;
@@ -178,7 +178,7 @@ bool kgd_gfx_v9_4_3_hqd_sdma_is_occupied(struct amdgpu_device *adev, void *mqd)
 	return false;
 }
 
-int kgd_gfx_v9_4_3_hqd_sdma_destroy(struct amdgpu_device *adev, void *mqd,
+static int kgd_gfx_v9_4_3_hqd_sdma_destroy(struct amdgpu_device *adev, void *mqd,
 				    unsigned int utimeout)
 {
 	struct v9_sdma_mqd *m;