drm/amd/amdgpu/gfx_v8_0: Functions must follow directly after their headers

Fixes the following W=1 kernel build warning(s):

 drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c:3698: warning: Excess function parameter 'adev' description in 'DEFAULT_SH_MEM_BASES'

Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: amd-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Cc: linux-media@vger.kernel.org
Cc: linaro-mm-sig@lists.linaro.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c

@@ -3687,6 +3687,7 @@ static void gfx_v8_0_setup_rb(struct amdgpu_device *adev)
 	mutex_unlock(&adev->grbm_idx_mutex);
 }
 
+#define DEFAULT_SH_MEM_BASES	(0x6000)
 /**
  * gfx_v8_0_init_compute_vmid - gart enable
  *
@@ -3695,7 +3696,6 @@ static void gfx_v8_0_setup_rb(struct amdgpu_device *adev)
  * Initialize compute vmid sh_mem registers
  *
  */
-#define DEFAULT_SH_MEM_BASES	(0x6000)
 static void gfx_v8_0_init_compute_vmid(struct amdgpu_device *adev)
 {
 	int i;