Fix performance issue when enlightenment started.
Fix performance issue when enlightenment started.

Change some logic in ARMSOCDRI2ScheduleSwap(). If src and dst has
same size and they are both no-framebuffer with compositor enabled,
we only need to exchange buffers between src and dst pixmap.

Change-Id: Iba0b3e248589bc8d05f5b52cfb12865790d812a3

OtherCrashOverride/armsoc-hardkernel,xin3liang/xf86-video-armsoc,sbambrough/xf86-video-armsoc,apxii/xf86-video-armsoc,freedesktop-unofficial-mirror/xorg__driver__xf86-video-armsoc,xin3liang/xf86-video-armsoc,mmind/xf86-video-armsoc,sbambrough/xf86-video-armsoc,singulared/xf86-video-armsoc,mmind/xf86-video-armsoc,singulared/xf86-video-armsoc,apxii/xf86-video-armsoc,OtherCrashOverride/armsoc-hardkernel,freedesktop-unofficial-mirror/xorg__driver__xf86-video-armsoc