MAINTAINERS: Update hinic maintainers from orphan

HINIC is marked orphan for 14 months from the commit "5cfe5109",
but there are lots of HINIC in use.

I have a SP582 NIC (hi1822 inside which is a kind of HINIC SOC),
and implement based on hinic driver, and if there are some patches
for HINIC, I can test and do some code review.

I'm active in linux contribution, if possible,
I want to take the hinic maintainership.

Add my email here to receive patches.
Signed-off-by: Cai Huoqing <cai.huoqing@linux.dev>
Signed-off-by: David S. Miller <davem@davemloft.net>

MAINTAINERS

@@ -9438,8 +9438,9 @@ F:	Documentation/devicetree/bindings/iio/humidity/st,hts221.yaml
 F:	drivers/iio/humidity/hts221*
 
 HUAWEI ETHERNET DRIVER
+M:	Cai Huoqing <cai.huoqing@linux.dev>
 L:	netdev@vger.kernel.org
-S:	Orphan
+S:	Maintained
 F:	Documentation/networking/device_drivers/ethernet/huawei/hinic.rst
 F:	drivers/net/ethernet/huawei/hinic/