[MIPS] rbtx4927: Fix some gcc warnings and a section mismatch.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/pci/fixup-rbtx4927.c b/arch/mips/pci/fixup-rbtx4927.c
index 3cdbecb..7450c33 100644
--- a/arch/mips/pci/fixup-rbtx4927.c
+++ b/arch/mips/pci/fixup-rbtx4927.c
@@ -79,7 +79,7 @@
 				     TX4927_IRQ_IOC_PCIC}
 };
 
-int pci_get_irq(struct pci_dev *dev, int pin)
+static int pci_get_irq(const struct pci_dev *dev, int pin)
 {
 	unsigned char irq = pin;