scsi: use pci_zalloc_consistent

scsi: use pci_zalloc_consistent

Remove the now unnecessary memset too.

Signed-off-by: Joe Perches <[email protected]>
Cc: Adam Radford <[email protected]>
Cc: "James E.J. Bottomley" <[email protected]>
Cc: Jayamohan Kallickal <[email protected]>
Cc: Dario Ballabio <[email protected]>
Cc: Michael Neuffer <[email protected]>
Cc: "Stephen M. Cameron" <[email protected]>
Cc: Neela Syam Kolli <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>