sparc: Support show_unhandled_signals.

Just faults right now, will add other traps later.

Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc arch/sparc/mm/fault_32.c
Simple merge

diff --cc arch/sparc/mm/fault_64.c
Simple merge

diff --cc kernel/sysctl.c
Simple merge