scsi: ufs: Change power mode on line reset

Line reset can occur during hibernate enter, exit or
during PA_INIT. In some cases, system slowness problem
is observed when line reset happened during hibernate
enter process in auto hibernate mode of operation as
link remains in PWM-G1 mode. To fix this problem, read
PA_PWRmode, PA_TxGear and PA_RxGear if line reset is
detected and if link is in PWM-G1 mode, initiate power
mode change to expected HS gear.

Change-Id: Ic06a11c917e8954743c4dcf80b89fedeec4584ed
Signed-off-by: Asutosh Das <asutoshd@codeaurora.org>
Signed-off-by: Sayali Lokhande <sayalil@codeaurora.org>