phy: phy-qcom-ufs: separate U11 user registers from phy registers

RUMI platform uses QRBTCv2 phy that has 2 separate sets of registers.
One is the phy register set, and the other is the U11 user registers.
Mapping both sets will require to map a larger range of memory that
is overlapping with the ICE registers address.
Separate into 2 independent memory mappings to avoid the conflict.

Change-Id: Ifdb426cdd7139e918c5c3747f5529b047f4fc1e5
Signed-off-by: Gilad Broner <gbroner@codeaurora.org>