Enable conservative governor

Change-Id: I5509e40378aef1312e7f1eb9f36621a63a9cd51f
taoshan: Increase MM heap size for smooth streaming

Change-Id: Ib92f5b29b81e4aa0a02c15bef503abac28974c5b
taoshan: Use performance cpufreq governor by default

*. This improves bootup time. Userspace will switch governors after
   boot is completed.

Change-Id: I882231cfee6248a6f9053dc8c84abf85c355cbd2
arm: Allow SCHED_HRTICK on ARM

Change-Id: If2b88db830ff54ab48d9efb54f936f93c2a077e3
drivers: cpufreq: Send a uevent when governor changes

 * Useful so userspace tools can reconfigure.

Change-Id: Ib423910b8b9ac791ebe81a75bf399f58272f64f2