scsi: ufs: core: Remove redundant parenthesis

Remove unnecessary parenthesis in ufshcd_is_wb_flags() and
ufshcd_is_wbattrs().

Link: https://lore.kernel.org/r/1891546521.01620896402035.JavaMail.epsvc@epcpadp3


Signed-off-by: Keoseong Park <keosung.park@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>