drm/amdgpu: Fix smatch static checker warning

adev->gfx.imu.funcs could be NULL
Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Likun Gao <Likun.Gao@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c

@@ -4498,11 +4498,11 @@ static int gfx_v11_0_hw_init(void *handle)
 			/* RLC autoload sequence 1: Program rlc ram */
 			if (adev->gfx.imu.funcs->program_rlc_ram)
 				adev->gfx.imu.funcs->program_rlc_ram(adev);
+			/* rlc autoload firmware */
+			r = gfx_v11_0_rlc_backdoor_autoload_enable(adev);
+			if (r)
+				return r;
 		}
-		/* rlc autoload firmware */
-		r = gfx_v11_0_rlc_backdoor_autoload_enable(adev);
-		if (r)
-			return r;
 	} else {
 		if (adev->firmware.load_type == AMDGPU_FW_LOAD_DIRECT) {
 			if (adev->gfx.imu.funcs && (amdgpu_dpm > 0)) {