Backport net5501 platform driver from 3.4.
Remove vestiges of old (pre-2.6.30) leds-net5501.c driver.
Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@30021 3c298f89-4303-0410-b956-a3cf2f4a3e73