qtnfmac: introduce new FullMAC driver for Quantenna chipsets

This patch adds support for new FullMAC WiFi driver for Quantenna
QSR10G chipsets.

QSR10G (aka Pearl) is Quantenna's 8x8, 160M, 11ac offering.
QSR10G supports 2 simultaneous WMACs - one 5G and one 2G.
5G WMAC supports 160M, 8x8 configuration. FW supports
up to 8 concurrent virtual interfaces on each WMAC.

Patch introduces 2 new drivers:
- qtnfmac.ko for interfacing with kernel wireless core
- qtnfmac_pearl_pcie.ko for interfacing with hardware over PCIe interface

Signed-off-by: Dmitrii Lebed <dlebed@quantenna.com>
Signed-off-by: Sergei Maksimenko <smaksimenko@quantenna.com>
Signed-off-by: Sergey Matyukevich <smatyukevich@quantenna.com>
Signed-off-by: Bindu Therthala <btherthala@quantenna.com>
Signed-off-by: Huizhao Wang <hwang@quantenna.com>
Signed-off-by: Kamlesh Rath <krath@quantenna.com>
Signed-off-by: Avinash Patil <avinashp@quantenna.com>
Signed-off-by: Igor Mitsyanko <igor.mitsyanko.os@quantenna.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>