[SCSI] NCR5380: fix NCR53C400_PSEUDO_DMA is not defined

In file included from drivers/scsi/g_NCR5380_mmio.c:9:
drivers/scsi/g_NCR5380.c:559:5: warning: "NCR53C400_PSEUDO_DMA" is not defined

Signed-off-by: Gabriel Craciunescu <nix.or.die@googlemail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>