aic94xx_sds: rename FLASH_SIZE

arm:

drivers/scsi/aic94xx/aic94xx_sds.c:381:1: warning: "FLASH_SIZE" redefined
In file included from include/asm/arch/irqs.h:22,
                 from include/asm/irq.h:4,
                 from include/asm/hardirq.h:6,
                 from include/linux/hardirq.h:7,
                 from include/asm-generic/local.h:5,
                 from include/asm/local.h:1,
                 from include/linux/module.h:19,
                 from include/linux/device.h:21,
                 from include/linux/pci.h:52,
                 from drivers/scsi/aic94xx/aic94xx_sds.c:28:
include/asm/arch/platform.h:444:1: warning: this is the location of the previous definition

Cc: Gilbert Wu <gilbert_wu@adaptec.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>