scsi: ufs: core: Track when MCQ ESI is enabled

In preparation of adding a threaded interrupt handler, track when the
MCQ ESI interrupt handlers were installed so we can optimize the MCQ
interrupt handling to avoid walking the threaded handler in the case ESI
handlers are enabled.

Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20250407-topic-ufs-use-threaded-irq-v3-2-08bee980f71e@linaro.org


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