net: qrtr: Move broadcast address change

Since the expected address format is different on remote endpoints,
move the address change logic into node_enqueue. This helps consolidate
the address change for other control packets that need to be added to
qrtr core logic.

Change-Id: I414e4c9c944b34d14592e500c39ca58802ef8f38
Signed-off-by: Chris Lew <clew@codeaurora.org>