phy: ufs: Add UFS PHY support for bengal

This change adds ufs phy support for bengal.

Some UFS devices violate T-HIBERN8_ENTER_TX time when moving Device
TX (Host RX) lane-1 from SLEEP to HIBERN8 at the end of burst causing
broken link situation after link starup.
This change also includes fix for above issue by increasing host PHY's
RX_MIN_HIBERN8_TIME to 8us.

Change-Id: Ib5908200f7a7ca94f76b2daaca13abbf35c6a3dd
Signed-off-by: Sayali Lokhande <sayalil@codeaurora.org>