kernel: fix backport of bcma init patch

Upstream bcma patch:
bcma: use separated function to initialize bus on SoC
was backported incompletely. I missed arch code change.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@42603 3c298f89-4303-0410-b956-a3cf2f4a3e73