P880: Product model correction

In most cm devices, the product model is the full name of the device.
This commit updates the (not nice) LG-P880 to Optimus 4X HD.

Change-Id: I2eef02abcd24bbe3247dd7b61ffd1132e2d76db2
P880: Use less aggressive mount options
Use only one samping rate on submix.

Change-Id: I8f712c54769374c55ccb95543abfe46bc4954abc
Device tree cleanup

Change-Id: I2b37e1b27cbab6844991681baf13fcb5c76f6228
Update GPS configuration to current standards.

Change-Id: I806c14fa66b25e97eadd70e1ccf41c2393b4c53d
We now provide our own GPS config.

Change-Id: I40212888b2ebe7865143e0400d14165031f43ff8
P880:add BOARD_HAVE_PRE_KITKAT_AUDIO_POLICY_BLOB config
This is needed for the recent hotword source fix.

Change-Id: I2e84e2dbb306715984b341f99f85d67f259214d3
Use google supl server for gps config.

Change-Id: Icd56e4c97aef83749704ca145580d70328d96a11