drm/amdgpu: fix compiler warnings

Fixes below compiler warnings:
 CC [M]  drivers/gpu/drm/amd/amdgpu/amdgpu_device.o
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c:381:1: warning: ‘static’ is not at beginning of declaration [-Wold-style-declaration]
  381 | void static inline amdgpu_mm_wreg_mmio(struct amdgpu_device *adev, uint32_t reg, uint32_t v, uint32_t acc_flags)
      | ^~~~
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c:381:1: warning: ‘inline’ is not at beginning of declaration [-Wold-style-declaration]
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c: In function ‘amdgpu_device_fini’:
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c:3381:6: warning: variable ‘r’ set but not used [-Wunused-but-set-variable]
 3381 |  int r;
      |      ^
Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -378,7 +378,9 @@ void amdgpu_mm_wreg8(struct amdgpu_device *adev, uint32_t offset, uint8_t value)
 		BUG();
 }
 
-void static inline amdgpu_mm_wreg_mmio(struct amdgpu_device *adev, uint32_t reg, uint32_t v, uint32_t acc_flags)
+static inline void amdgpu_mm_wreg_mmio(struct amdgpu_device *adev,
+				       uint32_t reg, uint32_t v,
+				       uint32_t acc_flags)
 {
 	trace_amdgpu_mm_wreg(adev->pdev->device, reg, v);
 
@@ -3378,8 +3380,6 @@ int amdgpu_device_init(struct amdgpu_device *adev,
  */
 void amdgpu_device_fini(struct amdgpu_device *adev)
 {
-	int r;
-
 	dev_info(adev->dev, "amdgpu: finishing device.\n");
 	flush_delayed_work(&adev->delayed_init_work);
 	adev->shutdown = true;
@@ -3402,7 +3402,7 @@ void amdgpu_device_fini(struct amdgpu_device *adev)
 	if (adev->pm_sysfs_en)
 		amdgpu_pm_sysfs_fini(adev);
 	amdgpu_fbdev_fini(adev);
-	r = amdgpu_device_ip_fini(adev);
+	amdgpu_device_ip_fini(adev);
 	release_firmware(adev->firmware.gpu_info_fw);
 	adev->firmware.gpu_info_fw = NULL;
 	adev->accel_working = false;