MIPS: Alchemy: merge Au1000 and Au1300-style IRQ controller code.

With a generic plat_irq_dispatch (for Alchemy at least) code for both
interrupt controller types can coexist in a single kernel image and be
autodetected at runtime.
Signed-off-by: Manuel Lauss <manuel.lauss@googlemail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2935/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/alchemy/common/Makefile

@@ -6,10 +6,7 @@
 #
 
 obj-y += prom.o time.o clocks.o platform.o power.o setup.o \
-	sleeper.o dma.o dbdma.o vss.o
-
-obj-$(CONFIG_ALCHEMY_GPIOINT_AU1000) += irq.o
-obj-$(CONFIG_ALCHEMY_GPIOINT_AU1300) += gpioint.o
+	sleeper.o dma.o dbdma.o vss.o irq.o
 
 # optional gpiolib support
 ifeq ($(CONFIG_ALCHEMY_GPIO_INDIRECT),)