EmbeddedPkg: Fix Command Argument for SD/eMMC R/W operation.

Issue : SD read failure for high capacity cards e.g. 64 GB

Reason : Command argument value exceeds 32 bit for block number 0x3787FFF
and cant be fit into 32 bit wide SD host controller register.

Fix :
AccessMode bits [29:30] of OCR is a valid definition to calculate
data address for eMMC cards.

For SD cards, data address is calculated on the basis of
card capacity status bit[30] of OCR.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Meenakshi Aggarwal <meenakshi.aggarwal@nxp.com>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>

EmbeddedPkg/Universal/MmcDxe/Mmc.h

@@ -70,6 +70,8 @@
 #define SD_HIGH_SPEED                       50000000
 #define SWITCH_CMD_SUCCESS_MASK             0x0f000000
 
+#define SD_CARD_CAPACITY                    0x00000002
+
 #define BUSWIDTH_4                          4
 
 typedef enum {