gpio: virtio: Add missing mailings lists in MAINTAINERS entry

Add gpio and virtualization lists in the MAINTAINERS entry for Virtio
gpio driver.
Reported-by: "Michael S. Tsirkin" <mst@redhat.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>

MAINTAINERS

@@ -19650,6 +19650,8 @@ F:	include/uapi/linux/virtio_fs.h
 VIRTIO GPIO DRIVER
 M:	Enrico Weigelt, metux IT consult <info@metux.net>
 M:	Viresh Kumar <vireshk@kernel.org>
+L:	linux-gpio@vger.kernel.org
+L:	virtualization@lists.linux-foundation.org
 S:	Maintained
 F:	drivers/gpio/gpio-virtio.c
 F:	include/uapi/linux/virtio_gpio.h