drivers/scsi/aacraid/src.c: silence two GCC warnings

drivers/scsi/aacraid/src.c: silence two GCC warnings

Compiling src.o for a 32 bit system triggers two GCC warnings:
    drivers/scsi/aacraid/src.c: In function `aac_src_deliver_message':
    drivers/scsi/aacraid/src.c:410:3: warning: right shift count >= width of type [enabled by default]
    drivers/scsi/aacraid/src.c:434:2: warning: right shift count >= width of type [enabled by default]

Silence these warnings by casting the 'address' variable (of type
dma_addr_t) to u64 on those two lines.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>