omap4-common: fix permissions for cpufreq/scaling_min_freq

this allow mediaserver to enable performance mode for OMAP4 USB Audio
which was overridden by init.cm.rc

Change-Id: Ie8be95b20786685708cb8a49c14d08454f2051dd
omap4-common: fix wifi/p2p-config
See https://github.com/Atrix2-Dev-Team/android_device_motorola_omap4-common/commit/da7bd2a1a9c442d4f210f6afb4700b0592a54936