dabba: add interface coalesce rpc call stubs.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
dabba: add interface coalesce modify cmd support.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
rpc: adaptive rx/tx coalesce are boolean flags.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
rpc: add interface capabilities modify rpc call.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
dabbad: add interface capabilities modify rpc stub.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>