usrsock/rpmsg: Change the dependence from OPENAMP to RPTUN
since all rpmsg driver need the extension api exposed by rptun driver
config NETUTILS_USRSOCK_RPMSG
tristate "RPMSG usrsock"
default n
- depends on NET && OPENAMP
+ depends on NET && RPTUN
select EVENT_FD if !NET_USRSOCK
---help---
Enable usrsock through rpmsg channel.
