sh: Tidy include/asm-sh/hp6xx.h

This patch removes defunct. led support functions from hp6xx.h since they are now
added in a proper driver (see commit below). Also adds tabs instead of spaces before comments.

*commit d39a7a63

Signed-off-by: Kristoffer Ericson <kristoffer.ericson@gmail.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>