livepatch: Update maintainers

Seth and Vojtech are no longer active maintainers of livepatch, so
remove them in favor of Jessica and Miroslav.

Also add Petr as a designated reviewer.

[jikos@kernel.org: Petr is the only one affected who hasn't provided his
 Ack by the time this patch has been applied, as he is offline curently;
 but I hereby assert that I've talked to him and he's OK with this change]
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Acked-by: Seth Jennings <sjenning@redhat.com>
Acked-by: Jessica Yu <jeyu@redhat.com>
Acked-by: Miroslav Benes <mbenes@suse.cz>
Acked-by: Vojtech Pavlik <vojtech@suse.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

MAINTAINERS

@@ -6561,9 +6561,10 @@ F:	drivers/platform/x86/hp_accel.c
 
 LIVE PATCHING
 M:	Josh Poimboeuf <jpoimboe@redhat.com>
-M:	Seth Jennings <sjenning@redhat.com>
+M:	Jessica Yu <jeyu@redhat.com>
 M:	Jiri Kosina <jikos@kernel.org>
-M:	Vojtech Pavlik <vojtech@suse.com>
+M:	Miroslav Benes <mbenes@suse.cz>
+R:	Petr Mladek <pmladek@suse.com>
 S:	Maintained
 F:	kernel/livepatch/
 F:	include/linux/livepatch.h