xf86-video-ati: revert switch to git master and use 7.5.0 for now

Andrea reported a regression in a multihead setup with glitches
in a second monitor with a Radeon R270X.

Close #2631

srcpkgs/xf86-video-ati/template

@@ -1,12 +1,13 @@
 # Template build file for 'xf86-video-ati'.
 pkgname=xf86-video-ati
-version=7.5.0.99.1
-revision=1
+reverts=7.5.0.99.1_1
+version=7.5.0
+revision=3
 lib32disabled=yes
 only_for_archs="i686 i686-musl x86_64 x86_64-musl"
 build_style=gnu-configure
 configure_args="--enable-glamor"
-hostmakedepends="automake git xorg-util-macros libtool pkg-config"
+hostmakedepends="pkg-config"
 makedepends="xf86driproto libudev-devel libpciaccess-devel
  libdrm-devel pixman-devel MesaLib-devel xorg-server-devel"
 depends="virtual?xserver-abi-video-19_1 mesa-ati-dri"
@@ -14,15 +15,5 @@ short_desc="Xorg ATI Radeon video driver"
 maintainer="Juan RP <xtraeme@voidlinux.eu>"
 homepage="http://xorg.freedesktop.org"
 license="MIT"
-#distfiles="${XORG_SITE}/driver/$pkgname-$version.tar.bz2"
-#checksum=ec3e6f06b6cf9a40c72aafa3448aae8b034c80b37410ca9442d5cf6806e07936
-
-do_fetch() {
-	git clone git://anongit.freedesktop.org/xorg/driver/xf86-video-ati $wrksrc
-	cd $wrksrc
-	# latest commit as of 20150928
-	git reset --hard 0288a4b87b65b
-}
-pre_configure() {
-	NOCONFIGURE=1 ./autogen.sh
-}
+distfiles="${XORG_SITE}/driver/$pkgname-$version.tar.bz2"
+checksum=ec3e6f06b6cf9a40c72aafa3448aae8b034c80b37410ca9442d5cf6806e07936