MIPS: RB532: Fix build error

mips/pci/fixup-rc32434.c must #include <asm/mach-rc32434/irq.h>

This patch fixes the following compile error caused by
commit 606a083
(MIPS: RB532: Cleanup the headers again):

<--  snip  -->

...
  CC      arch/mips/pci/fixup-rc32434.o
arch/mips/pci/fixup-rc32434.c: In function 'pcibios_map_irq':
arch/mips/pci/fixup-rc32434.c:46: error: 'GROUP4_IRQ_BASE' undeclared (first use in this function)
arch/mips/pci/fixup-rc32434.c:46: error: (Each undeclared identifier is reported only once
arch/mips/pci/fixup-rc32434.c:46: error: for each function it appears in.)
make[2]: *** [arch/mips/pci/fixup-rc32434.o] Error 1

<--  snip  -->

A virtually identical patch was also submitted by Yoichi Yuasa
<[email protected]>.

Signed-off-by: Adrian Bunk <[email protected]>
Acked-by: Florian Fainelli <[email protected]>
Signed-off-by: Ralf Baechle <[email protected]>

arch/mips/pci/fixup-rc32434.c

@@ -30,6 +30,7 @@
 #include <linux/init.h>
 
 #include <asm/mach-rc32434/rc32434.h>
+#include <asm/mach-rc32434/irq.h>
 
 static int __devinitdata irq_map[2][12] = {
 	{0, 0, 2, 3, 2, 3, 0, 0, 0, 0, 0, 1},