bcm53xx: add temp bcma workaround that allows debugging

This way we will get logs if case of hang/crash in bcma or related code.

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


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@42894 3c298f89-4303-0410-b956-a3cf2f4a3e73