mmc: add MMC_VERSION_5_1

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
(cherry picked from commit 1a3619cf825fcef15ebe0fac6d65a9af1bc0588c)

Change-Id: I7884f7b58cadb6935ffa266d35af64a4e5ca68cb
Signed-off-by: Gokul Sriram Palanisamy <gokulsri@codeaurora.org>
diff --git a/include/mmc.h b/include/mmc.h
index 00d8706..982d133 100644
--- a/include/mmc.h
+++ b/include/mmc.h
@@ -49,6 +49,7 @@
 #define MMC_VERSION_4_41	MAKE_MMC_VERSION(4, 4, 1)
 #define MMC_VERSION_4_5		MAKE_MMC_VERSION(4, 5, 0)
 #define MMC_VERSION_5_0		MAKE_MMC_VERSION(5, 0, 0)
+#define MMC_VERSION_5_1		MAKE_MMC_VERSION(5, 1, 0)
 
 #define MMC_MODE_HS		(1 << 0)
 #define MMC_MODE_HS_52MHz	(1 << 1)