net: qrtr: use alloc_skb_with_frags() in rx path

net_dev_alloc() fails for high order allocations in system where memory
is fragmented and cause communication stall due to packet drops.

Use alloc_skb_with_frags() to avoid packet drops in memory fragmented case.

This change squashes the following commits from msm-4.14:
  commit 5121b211a5e6 ("net: qrtr: Use skb with fragments in memory
                        failure case")
  commit bdc91a0dae07 ("net: qrtr: use alloc_skb_with_frag() in rx path")

In addition, fix minor format issues and update the copyright.

Change-Id: I46b7e0da0ed04c9222c975ee930f0f8d9b41453b
Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org>