Revert "icecat: enable ppc64* just as for firefox-esr"

This reverts commit d349e704ebd7bd2db249a03eb91f92b16042bd95.

@pullmoll please, read commit messages next time

srcpkgs/icecat/template

@@ -31,6 +31,10 @@ case $XBPS_TARGET_MACHINE in
 	ppc*) broken="xptcall bitrot" ;;
 esac
 
+if [ "$XBPS_TARGET_ENDIAN" = "be" ]; then
+	broken="rendering is busted, dunno why"
+fi
+
 CXXFLAGS="-Wno-class-memaccess -Wno-unused-function"
 
 if [ "$XBPS_TARGET_NO_ATOMIC8" ]; then