sh: Fix up FPU build for SH5

After the recent FPU optimisation commit the signature of save_fpu()
changed. "regs" wasn't used in the implementation of save_fpu() anyway.

Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/kernel/signal_64.c b/arch/sh/kernel/signal_64.c
index feb3ddd..ce76dbd 100644
--- a/arch/sh/kernel/signal_64.c
+++ b/arch/sh/kernel/signal_64.c
@@ -314,7 +314,7 @@
 
 	if (current == last_task_used_math) {
 		enable_fpu();
-		save_fpu(current, regs);
+		save_fpu(current);
 		disable_fpu();
 		last_task_used_math = NULL;
 		regs->sr |= SR_FD;