MAINTAINERS: Add maintainer to network subsystem

Add myself as co maintainer to network subsystem
Acked-by: Tom Rini <trini@konsulko.com>
Acked-by: Marek Vasut <marex@denx.de>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 6d8c467..b82b7ad 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -893,6 +893,7 @@
 
 NETWORK
 M:	Joe Hershberger <joe.hershberger@ni.com>
+M:	Ramon Fried <rfried.dev@gmail.com>
 S:	Maintained
 T:	git https://gitlab.denx.de/u-boot/custodians/u-boot-net.git
 F:	drivers/net/