MIPS: ath79: rename pci-ath724x.c to make it reflect the real SoC name

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Acked-by: René Bolldorf <xsecute@googlemail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3489/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/pci/Makefile

@@ -19,7 +19,7 @@ obj-$(CONFIG_BCM47XX)		+= pci-bcm47xx.o
 obj-$(CONFIG_BCM63XX)		+= pci-bcm63xx.o fixup-bcm63xx.o \
 					ops-bcm63xx.o
 obj-$(CONFIG_MIPS_ALCHEMY)	+= pci-alchemy.o
-obj-$(CONFIG_SOC_AR724X)	+= pci-ath724x.o
+obj-$(CONFIG_SOC_AR724X)	+= pci-ar724x.o
 
 #
 # These are still pretty much in the old state, watch, go blind.