CEC: Do not terminate ARC on send error busy

Silently ignores the transmission error busy/failure for
the command <Report ARC Initiated> to keep the ARC on.
Termination is done only for the explicit error (NAK).

Bug: 20267416
Change-Id: I649d6494855b2d6aa0cecc8fd76d36001c0edb68
1 file changed