[MIPS] Check FCSR for pending interrupts, alternative version

Commit 6d6671066a311703bca1b91645bb1e04cc983387 is incomplete and misses
non-r4k CPUs.  This patch reverts the commit and fixes in other way.

 o Do FCSR checking in caller of restore_fp_context.
 o Send SIGFPE if the signal handler set any FPU exception bits.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --cc arch/mips/kernel/r4k_fpu.S
Simple merge

diff --cc arch/mips/kernel/signal-common.h
Simple merge

diff --cc arch/mips/kernel/signal.c
Simple merge

diff --cc arch/mips/kernel/signal32.c
Simple merge

diff --cc arch/mips/kernel/signal_n32.c
Simple merge