brcm63xx: fix ohci frame number offset

BCM63XX's ohci controller does not need the frame number shift, but that
was guarded with a PPC symbol. Fix this by making the no-fix generally
available.

This is a regression from the previous conversion to ohci platform driver.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39274 3c298f89-4303-0410-b956-a3cf2f4a3e73