PC-BSD/trueos 6769936stand/efi/libefi efinet.c, stand/libsa net.h

MFC r349928: Allow efi loader to get network params from uboot

Summary:
efi loader does not work with static network parameters. It always uses
BOOTP/DHCP and also uses RARP as a fallback.  Problems with DHCP servers can
cause the loader to fail to populate network parameters.
DeltaFile
+73-0stand/efi/libefi/efinet.c
+1-0stand/libsa/net.h
+74-02 files

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