ARM: at91: add sam9_smc.o to at91sam9x5 build

Add these SMC accessors to the at91sam9x5 as we will need them for
NAND flash (for instance).
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

arch/arm/mach-at91/Makefile

@@ -20,7 +20,7 @@ obj-$(CONFIG_ARCH_AT91SAM9263)	+= at91sam9263.o at91sam926x_time.o at91sam9263_d
 obj-$(CONFIG_ARCH_AT91SAM9RL)	+= at91sam9rl.o at91sam926x_time.o at91sam9rl_devices.o sam9_smc.o
 obj-$(CONFIG_ARCH_AT91SAM9G20)	+= at91sam9260.o at91sam926x_time.o at91sam9260_devices.o sam9_smc.o
 obj-$(CONFIG_ARCH_AT91SAM9G45)	+= at91sam9g45.o at91sam926x_time.o at91sam9g45_devices.o sam9_smc.o
-obj-$(CONFIG_ARCH_AT91SAM9X5)	+= at91sam9x5.o at91sam926x_time.o
+obj-$(CONFIG_ARCH_AT91SAM9X5)	+= at91sam9x5.o at91sam926x_time.o sam9_smc.o
 obj-$(CONFIG_ARCH_AT91X40)	+= at91x40.o at91x40_time.o
 
 # AT91RM9200 board-specific support