[ARM] 5321/1: Kirkwood: fix typo in Makefile

Signed-off-by: NNicolas Pitre <nico@marvell.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-kirkwood/Makefile

@@ -2,4 +2,4 @@ obj-y				+= common.o addr-map.o irq.o pcie.o
 
 obj-$(CONFIG_MACH_DB88F6281_BP)		+= db88f6281-bp-setup.o
 obj-$(CONFIG_MACH_RD88F6192_NAS)	+= rd88f6192-nas-setup.o
-obj-$(CONFIG_MACH_RD88F6192_NAS)	+= rd88f6281-setup.o
+obj-$(CONFIG_MACH_RD88F6281)		+= rd88f6281-setup.o