[MIPS] MV6434x: Add prototype of interrupt dispatch function.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

include/asm-mips/marvell.h

@@ -53,4 +53,6 @@ struct mv_pci_controller {
 	unsigned long   config_vreg;
 };
 
+extern void ll_mv64340_irq(struct pt_regs *regs);
+
 #endif	/* __ASM_MIPS_MARVELL_H */