avr32: Fix wrong error flags in atmel_mci driver

Make sure we check for CRC errors when sending commands that use CRC
checking.

Reported-by: Gururaja Hebbar K R <gururajakr@sanyo.co.in>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>

cpu/at32ap/atmel_mci.c

diff --git a/cpu/at32ap/atmel_mci.c b/cpu/at32ap/atmel_mci.c
index 3ce9ea5..226b5c0 100644
--- a/cpu/at32ap/atmel_mci.c
+++ b/cpu/at32ap/atmel_mci.c
@@ -139,7 +139,7 @@
 
 	pr_debug("mmc: status 0x%08lx\n", status);
 
-	if (status & ERROR_FLAGS) {
+	if (status & error_flags) {
 		printf("mmc: command %lu failed (status: 0x%08lx)\n",
 		       cmd, status);
 		return -EIO;