UPSTREAM: scsi: ufs: ufs-mediatek: Eliminate error message for unbound mphy

Some MediaTek platforms does not have to bind MPHY so users shall not see
any unnecessary logs. Simply remove logs for this case.

Link: https://lore.kernel.org/r/20200908064507.30774-2-stanley.chu@mediatek.com


Fixes: fc4983018fea ("scsi: ufs-mediatek: Allow unbound mphy")
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
(cherry picked from commit 30a90782c105fe498df74161392aa143796b6886)
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I01f51f1532bf1826692b22b5650acd25a63f3698