Allow registration of multiple kprobes at an address in an architecture
agnostic way.  Corresponding handlers will be invoked in a sequence.  But,
a kprobe and a jprobe can't (yet) co-exist at the same address.

Signed-off-by: Ananth N Mavinakayanahalli <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>