mmc: add MMC_VERSION_5_1

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 7586558..aabfc71 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -1227,6 +1227,9 @@
 		case 7:
 			mmc->version = MMC_VERSION_5_0;
 			break;
+		case 8:
+			mmc->version = MMC_VERSION_5_1;
+			break;
 		}
 
 		/* The partition data may be non-zero but it is only