MdeModulePkg/UfsBlockIoPei: fix the bit in UFS_HC_UTRLDBR_OFFSET reg
MdeModulePkg/UfsBlockIoPei: fix the bit in UFS_HC_UTRLDBR_OFFSET reg

When UPIU packet is sent, (BIT0 << Slot) should be set according
to context.  But BIT0 is used without Slot when UfsWaitMemSet ()
is invoked.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Haojian Zhuang <979139d45d262f0480136b0da512e0afa0fe79d3@linaro.org>
Reviewed-by: Feng Tian <e66bb7e9f36c82a029035c5885acf75500d07e68@intel.com>

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