drm/radeon: make missing smc ucode non-fatal (CI)

Prevent driver load problems if the smc is missing.

bug:
https://bugzilla.kernel.org/show_bug.cgi?id=63011Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/cik.c

@@ -1694,6 +1694,7 @@ static int cik_init_microcode(struct radeon_device *rdev)
 			       fw_name);
 			release_firmware(rdev->smc_fw);
 			rdev->smc_fw = NULL;
+			err = 0;
 		} else if (rdev->smc_fw->size != smc_req_size) {
 			printk(KERN_ERR
 			       "cik_smc: Bogus length %zu in firmware \"%s\"\n",