sh: Don't miss pending signals returning to user mode after signal processing

Without this patch, signals sent during architecture specific signal
handling (typically as a result of the user's stack being inaccessible)
are ignored.

This is the SH version of commit c3ff8ec3
which was for the i386.
Signed-off-by: NStuart Menefy <stuart.menefy@st.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

arch/sh/kernel/entry-common.S

@@ -192,7 +192,7 @@ work_resched:
 	.align	2
 1:	.long	schedule
 2:	.long	do_notify_resume
-3:	.long	restore_all
+3:	.long	resume_userspace
 #ifdef CONFIG_TRACE_IRQFLAGS
 4:	.long	trace_hardirqs_on
 5:	.long	trace_hardirqs_off