9475 libefi: Do not return only if ReceiveFilter fails
Review Request #1074 - Created April 15, 2018 and submitted
https://svnweb.freebsd.org/base?view=revision&revision=331767 If the network interface or the uefi implementation do not support the ReceiveFilter interface do not return only and just print a message. U-Boot doesn't support is and likely never will. Also even if this fails it doesn't mean that network in EFI isn't supported.