MMC: BUG: fix the operand of CMD1 command of MMC

The operand of CMD1 command should be the required VDD voltage window
as Table 41 - OCR register definitions of JESD84-A441

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Tested by: Ke Allen <Allen.Ke@atmel.com>