bcm53xx: make the l2x0 L2 cache controller work

This fixes the DMA problems with the Ethernet driver.
This also updates some other parts of the patches.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39203 3c298f89-4303-0410-b956-a3cf2f4a3e73