Move bp_type_idx to include/linux/hw_breakpoint.h

This has a "#ifdef CONFIG_*" that used to be exposed to userspace.

The names in here are so generic that I don't think it's a good idea
to expose them to userspace (or even the rest of the kernel).  There are
multiple in-kernel users, so it's been moved to a kernel header file.

Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>
Reviewed-by: Andrew Waterman <waterman@eecs.berkeley.edu>
Reviewed-by: Albert Ou <aou@eecs.berkeley.edu>
Message-Id: <1447119071-19392-10-git-send-email-palmer@dabbelt.com>
[thuth: Remove it also from tools/include/uapi/linux/hw_breakpoint.h]
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>