scsi: ufs: core: Do not write interrupt enable register unnecessarily

Write a new value to the interrupt enable register only if it is
different from the old value, thereby saving a register write operation.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20250723165856.145750-8-adrian.hunter@intel.com


Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>