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/process_64.c b/arch/sh/kernel/process_64.c
index 359b8a2..31f80c6 100644
--- a/arch/sh/kernel/process_64.c
+++ b/arch/sh/kernel/process_64.c
@@ -404,7 +404,7 @@
 	if (fpvalid) {
 		if (current == last_task_used_math) {
 			enable_fpu();
-			save_fpu(tsk, regs);
+			save_fpu(tsk);
 			disable_fpu();
 			last_task_used_math = 0;
 			regs->sr |= SR_FD;
@@ -431,7 +431,7 @@
 #ifdef CONFIG_SH_FPU
 	if(last_task_used_math == current) {
 		enable_fpu();
-		save_fpu(current, regs);
+		save_fpu(current);
 		disable_fpu();
 		last_task_used_math = NULL;
 		regs->sr |= SR_FD;