package/kernel: add package for the Gianfar PTP driver

PTP for gianfar can be built as a module. Create a package for it.

[juhosg: remove the mp85xx specific patch]

Patchwork: http://patchwork.openwrt.org/patch/3344/


Signed-off-by: Wojciech Dubowik <Wojciech.Dubowik@neratec.com>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35706 3c298f89-4303-0410-b956-a3cf2f4a3e73