dri2: add missing FreeScratchGC() call
dri2: add missing FreeScratchGC() call

freedesktop-unofficial-mirror/xorg__driver__xf86-video-armsoc,Popolon/xf86-video-armsoc,sbambrough/xf86-video-armsoc,apxii/xf86-video-armsoc,markyzq/armsoc-rockchip,mmind/xf86-video-armsoc,rcn-ee/xf86-video-omap,apxii/xf86-video-armsoc,OtherCrashOverride/armsoc-hardkernel,commshare/xf86-video-armsoc,freedesktop-unofficial-mirror/xorg__driver__xf86-video-armsoc,Popolon/xf86-video-armsoc,freedesktop-unofficial-mirror/xorg__driver__xf86-video-omap,RobertCNelson/xf86-video-omap,sbambrough/xf86-video-armsoc,mmind/xf86-video-armsoc,commshare/xf86-video-armsoc,OtherCrashOverride/armsoc-hardkernel,mdrjr/xf86-video-armsoc,RobertCNelson/xf86-video-omap,markyzq/armsoc-rockchip,xin3liang/xf86-video-armsoc,singulared/xf86-video-armsoc,robclark/xf86-video-omap,rcn-ee/xf86-video-omap,freedesktop-unofficial-mirror/xorg__driver__xf86-video-omap,xin3liang/xf86-video-armsoc,robclark/xf86-video-omap,mdrjr/xf86-video-armsoc,singulared/xf86-video-armsoc