scsi: ufs: mcq: Use pointer arithmetic in ufshcd_send_command()

Make sqe_base_addr the UTRD pointer it is, instead of an opaque void *.

Signed-off-by: Avri Altman <avri.altman@wdc.com>
Link: https://lore.kernel.org/r/20230329101303.18377-3-avri.altman@wdc.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>