Revert "Add alternative KVM MAC address blacklist"

This reverts commit 634afac119.

54:52:00 was just a bug in libvirt, and that's better fixed locally,
and we should not carry it in udev rules.

extras/rule_generator/75-persistent-net-generator.rules

@@ -30,7 +30,7 @@ ENV{MATCHADDR}="$attr{address}"
 ENV{MATCHIFTYPE}="$attr{type}"
 
 # ignore KVM virtual interfaces
-ENV{MATCHADDR}=="52:54:00:*|54:52:00:*", GOTO="persistent_net_generator_end"
+ENV{MATCHADDR}=="52:54:00:*", GOTO="persistent_net_generator_end"
 # ignore VMWare virtual interfaces
 ENV{MATCHADDR}=="00:0c:29:*|00:50:56:*", GOTO="persistent_net_generator_end"