Board-pyramid: allocate more RAM to audio and remove FB_MSM_OVERLAY_WRITEBACK

Signed-off-by: Sultanxda <sultanxda@gmail.com>
Update defconfig:
*Removed some useless memory allocations (FB_MSM_OVERLAY_WRITEBACK and HDMI)
*Enabled the HIGHMEM HIGHPTE option (Allocate 2nd-level pagetables from highmem)
*Fixed compile error in kgsl with the HIGHPTE option

Signed-off-by: Sultanxda <sultanxda@gmail.com>
Acpuclock: increase voltages

I used Sebastian's voltages from his 3.4.10 kernel as it seems he's had success with them.