p31xx/p51xx: Disable Samsung enhanced low memory killer

Suspect cause of battery drain on KitKat
p51xx: Disable experimental P51xx Y-Cable support
configs: Build USB serial PL2302 as module
bcmdhd: Restore previous 1.28.19.4 (RC2_1130) driver
configs: Update configs for bcmdhd 1.28.19.4
p31xx/p51xx: Update configs for bcmdhd 1.28.19.4
configs: Disable Vivante 2D graphics support

Only OMAP4470 utilized Vivante GC320 dedicated 2D graphics core
p31xx/p51xx: Disable Vivante 2D graphics support

Only OMAP4470 utilized Vivante GC320 dedicated 2D graphics core