mm-video: Use multimedia heap on MSM7x30 (720p) too.

Change-Id: I8c7997a1fdd9490cbec9729b07a50f40b1c07c2b
mm-core: Remove obsolete msm7x30 OMX code

This is a leftover since long time ago, remove it to prevent
any conflicts with the normal omx

Change-Id: I8c2ddfb851dc3147361de17fe929b0a577ad9270
Merge remote-tracking branch 'cm/cm-11.0' into cm-11.0