soc/intel/quark/storage_test.c: Remove duplicated "ERROR" in log message

Change-Id: I7697512a63b58ca7d7200c74a409822389db0762
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61636
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>

src/soc/intel/quark/storage_test.c

@@ -184,8 +184,7 @@ void storage_test(uint32_t bar, int full_initialization)
 		err = sdhci_controller_init(sdhci_ctrlr, (void *)bar);
 		if (err) {
 			display_log();
-			printk(BIOS_ERR,
+			printk(BIOS_ERR, "Controller failed to initialize, err = %d\n",
-				"ERROR - Controller failed to initialize, err = %d\n",
 				err);
 			return;
 		}