scsi: ufs: renesas: Refactor 0x10ad/0x10af PHY settings

Extract specific PHY setting of the 0x10a[df] registers into a new
function.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/110eafd1ee24f9db0285a5e2bca224e35962268a.1741179611.git.geert+renesas@glider.be


Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>