UPSTREAM: ath10k: add qmi service helpers for wcn3990 qmi client

WLAN qmi server running in Q6 exposes host to target
cold boot qmi handshakes. Add WLAN QMI service helpers
for ath10k wcn3990 qmi client.

Signed-off-by: Govind Singh <govinds@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Git-commit: bc17d4b90cdd3e557d195937c0003260dfce67d6
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git


Change-Id: I1a0f39fa2f5b9de731b4e3b0202ea29faf4ecfeb
Signed-off-by: Dundi Raviteja <dundi@codeaurora.org>