QCA: Add Bluetooth firmware for QCA6698

This commit will add required Bluetooth firmware files for QCA6698
The image version is 2.1.2-00035.

The QCA6698 Bluetooth chip, while sharing the same IP core as the
WCN6855, has different RF components and RAM sizes. This means it
requires new firmware files. Use a different firmware directory
to save the NVM and rampatch files.

Currently there are two connectivity boards using QCA6698 for
sa8775p-ride platform, the board id are 206 and 207 respectively.
So add two board specific nvm files.

hpbtfw21.tlv : RAM FW dump
hpnv21.b206  : NVM dump
hpnv21.b207  : NVM dump
hpnv21.bin   : NVM dump

Signed-off-by: Cheng Jiang <quic_chejiang@quicinc.com>

WHENCE

@@ -4823,7 +4823,18 @@ File: qca/hmtnv20.bin
 
 Licence: Redistributable. See LICENSE.qcom and qca/NOTICE.txt for details
 
---------------------------------------------------------------------------
+---------------------------------------------------------------------------
+
+Driver: qca - Qualcomm Atheros Bluetooth support for QCA6698AQ chips
+
+File: qca/QCA6698/hpbtfw21.tlv
+File: qca/QCA6698/hpnv21.b206
+File: qca/QCA6698/hpnv21.b207
+File: qca/QCA6698/hpnv21.bin
+
+Licence: Redistributable. See LICENSE.qcom and qca/NOTICE.txt for details
+
+-------------------------------------------------------------------------
 
 Driver: liquidio -- Cavium LiquidIO driver