scsi: aacraid: Mark expected switch fall-through

In preparation to enabling -Wimplicit-fallthrough, mark switch cases where
we are expecting to fall through.

Signed-off-by: Gustavo A. R. Silva <[e-mail]>
Reviewed-by: Dave Carroll <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/scsi/aacraid/linit.c

···
 			    !(aac->raw_io_64) ||
 			    ((cmd->cmnd[1] & 0x1f) != SAI_READ_CAPACITY_16))
 				break;
+			/* fall through */
 		case INQUIRY:
 		case READ_CAPACITY:
 			/*