serrano: Remove now redundant flags

Change-Id: I84514f93c7e6c5ba0a2f2c2d53aded9be2e5927b
serrano: Hugely simplify MAC address generation

 * We can just write it directly to a sysfs node now

Change-Id: I3e42206ad205ad15e820d8229a524ebc495a937d
Merge branch 'cm-11.0' into kk_mkt