scsi: ufs-qcom: update delay between assert/deassert in full reset

The hardware requirement for delay between assert/deassert
is at least 3-4 sleep clock (32.7KHz) cycles, which comes to
~125us (4/32768). To be on the safe side add 200us delay.

Change-Id: Ib9d27fe7bbf6107b1249b3719f63efdbff4b3795
Signed-off-by: Venkat Gopalakrishnan <venkatg@codeaurora.org>