ramips: enable CPS for mt7621
Enables CPS multiprocessing instead ob obsoleted CMP for mt7621.
This patch fixes a few issues currently existing on 4.3 kernel with at least ubnt-erx:
* iperf shows only 50Mbits on direct gigabit connection to desktop,
* ping times jump to 5-6ms to dorectly connected desktop
* /proc/interrupts shows spurious interrups (ERR)
Signed-off-by: Nikolay Martynov <mar.kolya@gmail.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@47842
3c298f89-4303-0410-b956-
a3cf2f4a3e73