mmc: Fix typo in MMC type checking macro

The version flag constant name used in IS_MMC macro is incorrect/undefined.

Signed-off-by: Andrew Gabbasov <andrew_gabbasov@mentor.com>

include/mmc.h

@@ -61,7 +61,7 @@
 #define SD_DATA_4BIT	0x00040000
 
 #define IS_SD(x)	((x)->version & SD_VERSION_SD)
-#define IS_MMC(x)	((x)->version & SD_VERSION_MMC)
+#define IS_MMC(x)	((x)->version & MMC_VERSION_MMC)
 
 #define MMC_DATA_READ		1
 #define MMC_DATA_WRITE		2