[MIPS] MV64340: Add missing prototype for mv64340_irq_init().

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

include/asm-mips/marvell.h

@@ -54,5 +54,6 @@ struct mv_pci_controller {
 };
 
 extern void ll_mv64340_irq(void);
+extern void mv64340_irq_init(unsigned int base);
 
 #endif	/* __ASM_MIPS_MARVELL_H */