mmc: sdhci-msm: Configure CMDEN_HS400_INPUT_MASK_CNT for cmdq

When sending CMD during data in HS400 Enhanced Strobe mode,
the command that is being sent is also sampled internally on
CMDIN line by the RCLK that is toggling due to the data traffic.
To mask this <false> CMDIN a new mask is introduced throughout
the CMD transmission time. This mask is controlled by
HC_VENDOR_SPECIFIC_FUNC3.CMDEN_HS400_INPUT_MASK_CNT register.
The default reset value of this register is 2.

Before running CMDQ transfers in HS400 Enhanced Strobe mode,
SW should write 3 to
HC_VENDOR_SPECIFIC_FUNC3.CMDEN_HS400_INPUT_MASK_CNT register.

Change-Id: If0467855e23cb93e57a4581b375885136902835d
Signed-off-by: Ritesh Harjani <riteshh@codeaurora.org>