ARC: ptrace support

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>

diff --cc arch/arc/Kconfig
Simple merge

diff --cc arch/arc/kernel/Makefile
Simple merge

diff --cc arch/arc/kernel/entry.S
Simple merge

diff --cc arch/arc/kernel/ptrace.c
Simple merge