proc: save LOC in __xlate_proc_name()

Can't look at this verbosity anymore.

Link: https://lkml.kernel.org/r/YFYXAp/fgq405qcy@localhost.localdomain


Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>