GLINK PKT provides a userspace interface to RPMSG GLINK through
character device node. Add the nodes and corresponding channel
devices to enable GLINK communication from userspace.
Change-Id: I2347b12c733459ead821db476e446fbde470c03a
Signed-off-by: Pranav Mahesh Phansalkar <quic_pphansal@quicinc.com>