UPSTREAM: ath10k: Add support for htt_data_tx_desc_64 descriptor

WCN3990 target uses 64 bit frags_paddr in htt tx descriptor,
which holds the physical address of SKB fragments in tx data path.

In order to support 64 bit bit frags_paddr in htt tx descriptor, define
htt_data_tx_desc_64 descriptor and ath10k_htt_tx_64 method for handling
tx data path with new descriptor fields.

Signed-off-by: Govind Singh <govinds@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Git-commit: e62ee5c381c59c2e426f187ea1bdf7942bfbb718
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git


Change-Id: Ic65f56ef52191562cdd5bca547081b679272ef61
Signed-off-by: Dundi Raviteja <dundi@codeaurora.org>