nfs: increased max read size

Signed-off-by: Roni Häcki <roni.haecki@inf.ethz.ch>

Remove invoke_frame_identify, replaced with frame_identify().

This commit fully removes the Frame_Identify invocation and replaces the
calls with frame_identify().
Additionally, because the KCB is special, this commit introduces a new
invocation kcb_identify() which translates the lvaddr in the KCB
capability into the pysical address of the kernel control block.

Signed-off-by: Simon Gerber <simon.gerber@inf.ethz.ch>

libnet: netbufs set vbase correctly

Signed-off-by: Roni Häcki <roni.haecki@inf.ethz.ch>

libnet: changed buffer allocation to new framework

Signed-off-by: Roni Häcki <roni.haecki@inf.ethz.ch>

tftpclient: converting to net sockets
net_sockets: adding local/remote addresses/ports to the net_socket structure
net,dhcp: adding a possibility of setting of static IP

Signed-off-by: Adam Turowski <adam.turowski@inf.ethz.ch>

libnet: refactor initialization code

Signed-off-by: Reto Achermann <reto.achermann@inf.ethz.ch>

libnet: use shifts instead of divisions for netbuf

Signed-off-by: Reto Achermann <reto.achermann@inf.ethz.ch>

libnet: adding buffer debug facilities

Signed-off-by: Reto Achermann <reto.achermann@inf.ethz.ch>

libnet: adding basic benchmarking for enqueue and lwip stack

Signed-off-by: Reto Achermann <reto.achermann@inf.ethz.ch>

initial commit of libnet

Signed-off-by: Reto Achermann <reto.achermann@inf.ethz.ch>