drm/amd/amdgpu/amdgpu_ras: Make local function 'amdgpu_ras_error_status_query' static

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

 drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c:1482:6: warning: no previous prototype for ‘amdgpu_ras_error_status_query’ [-Wmissing-prototypes]

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: amd-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -1472,8 +1472,8 @@ static void amdgpu_ras_log_on_err_counter(struct amdgpu_device *adev)
 }
 
 /* Parse RdRspStatus and WrRspStatus */
-void amdgpu_ras_error_status_query(struct amdgpu_device *adev,
-		struct ras_query_if *info)
+static void amdgpu_ras_error_status_query(struct amdgpu_device *adev,
+					  struct ras_query_if *info)
 {
 	/*
 	 * Only two block need to query read/write