scsi: hpsa: hpsa_ioctl(): Tidy up a bit

Link: https://lore.kernel.org/r/20200529234028.46373-4-viro@ZenIV.linux.org.uk


Acked-by: Don Brace <don.brace@microsemi.com>
Tested-by: Don Brace <don.brace@microsemi.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>