drivers: qe: avoid double free()

Avoid calling free(addr) twice if the device for ucode is not found.

The problem was indicated by cppcheck.
Signed-off-by: NHeinrich Schuchardt <xypron.glpk@gmx.de>

drivers/qe/qe.c

@@ -288,7 +288,6 @@ void u_qe_init(void)
 	struct mmc *mmc = find_mmc_device(CONFIG_SYS_MMC_ENV_DEV);
 
 	if (!mmc) {
-		free(addr);
 		printf("\nMMC cannot find device for ucode\n");
 	} else {
 		printf("\nMMC read: dev # %u, block # %u, count %u ...\n",