ARC: Add instruction_pointer_set() API

Add instruction_pointer_set() API for arc.

Link: https://lkml.kernel.org/r/163163050148.489837.15187799269793560256.stgit@devnote2



Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>