scsi: mvsas: Remove unused mvs_phys_reset()

mvs_phys_reset() was added in 2009's commit 20b09c29 ("[SCSI] mvsas:
add support for 94xx; layout change; bug fixes") but hasn't been used.

Remove it.

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Link: https://lore.kernel.org/r/20250127002601.113555-1-linux@treblig.org


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