Revert "s3cfb_ops: Disable LPM display support"

This reverts commit 610a224c6d7349df1ef5d84ed8158e5023b949e3.
Enable SUPPORT_LPM_PAN_DISPLAY on LPM mode only

Normal boot graphics not working properly with SUPPORT_LPM_PAN_DISPLAY
enabled but the new lpm binary from KitKat not working properly
without this support.