sh: switch to generic old sigsuspend()

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

diff --cc arch/sh/Kconfig
Simple merge

diff --cc arch/sh/include/asm/syscalls_32.h
Simple merge

diff --cc arch/sh/kernel/signal_32.c
Simple merge

diff --cc arch/sh/kernel/signal_64.c
Simple merge