UPSTREAM: ath10k: Add hw param for rx ring size support

WCN3990 uses larger ring size in comparison to existing
ring size value.
Add rx ring size hw param for supporting different rx ring
size across multiple target.

Signed-off-by: Govind Singh <govinds@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Git-commit: bb8d0d15fc6a401f774f7635437f1eaa57ae3106
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git


Change-Id: Id846a11c86467dabe2a14b0cd00aac9b364dab3b
Signed-off-by: Dundi Raviteja <dundi@codeaurora.org>