bcm27xx: refresh kernel patches
The patch 950-0019-BCM2708-Add-core-Device-Tree-support.patch creates a
symbolic link. It looks like quilt does not support this and never
refreshed it.
I removed the symbolic link, refreshed the patch and then added it
back again.
Link: https://github.com/openwrt/openwrt/pull/21431
Signed-off-by: Hauke Mehrtens <[email protected]>