graphics: add support for "single buffering"
graphics: add support for "single buffering"

When we don't have enough video memory for double buffering we
fallback to "single buffering".

Change-Id: I8bfab6d8cd6b54f0cc6c67edc41a4c37d8fbd4ba
Signed-off-by: Octavian Purdila <77c06d0261d8d3a9171f87dd4ca9bbbd1924db77@intel.com>
Signed-off-by: Andrew Boie <aab045b28152628be6af0e556050d0381fd0a34d@intel.com>

randomblame/bootable_recovery,DerTeufel/dualboot_recovery,Plain-Andy/android_platform_bootable_recovery,kylinmoddev/android_bootable_recovery,randomblame/bootable_recovery,DerTeufel/dualboot_recovery,76Demented/bootable_recovery-,DerTeufel/dualboot_recovery,Plain-Andy/android_platform_bootable_recovery,randomblame/bootable_recovery,randomblame/bootable_recovery,Plain-Andy/android_platform_bootable_recovery,InsomniaAOSP/platform_bootable_recovery,kylinmoddev/android_bootable_recovery,randomblame/bootable_recovery,kylinmoddev/android_bootable_recovery,Plain-Andy/android_platform_bootable_recovery,76Demented/bootable_recovery-,InsomniaAOSP/platform_bootable_recovery,kylinmoddev/android_bootable_recovery,InsomniaAOSP/platform_bootable_recovery,76Demented/bootable_recovery-,DerTeufel/dualboot_recovery,InsomniaAOSP/platform_bootable_recovery,InsomniaAOSP/platform_bootable_recovery,76Demented/bootable_recovery-,76Demented/bootable_recovery-,DerTeufel/dualboot_recovery