MIPS: ath79: add PCI controller registration code for the QCA955X SoCs

Add SoC specific PCI IRQ map, and register platform
devices for the two built-in PCIe RCs.

Cc: Rodriguez, Luis <rodrigue@qca.qualcomm.com>
Cc: Giori, Kathy <kgiori@qca.qualcomm.com>
Cc: QCA Linux Team <qca-linux-team@qca.qualcomm.com>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/4951/
Signed-off-by: John Crispin <blogic@openwrt.org>
diff --git a/arch/mips/ath79/Kconfig b/arch/mips/ath79/Kconfig
index 77926e3..76a001e 100644
--- a/arch/mips/ath79/Kconfig
+++ b/arch/mips/ath79/Kconfig
@@ -90,6 +90,8 @@
 
 config SOC_QCA955X
 	select USB_ARCH_HAS_EHCI
+	select HW_HAS_PCI
+	select PCI_AR724X if PCI
 	def_bool n
 
 config PCI_AR724X