[POWERPC] ARCH=ppc pt_regs fixes

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/ppc/syslib/open_pic2.c

@@ -529,7 +529,7 @@ static void openpic2_end_irq(unsigned int irq_nr)
 }
 
 int
-openpic2_get_irq(struct pt_regs *regs)
+openpic2_get_irq(void)
 {
 	int irq = openpic2_irq();