arm64: dts: qcom: qrb2210-rb1: add wifi variant property

arm64: dts: qcom: qrb2210-rb1: add wifi variant property

The RB1 platform doesn't have board-specific board-id programmed, it uses
generic 0xff. Thus add the property with the 'variant' of the
calibration data.

Note: the driver will check for the calibration data for the following
IDs, so existing board-2.bin files will continue to work.

- 'bus=snoc,qmi-board-id=ff,qmi-chip-id=120,variant=Thundercomm_RB1'
- 'bus=snoc,qmi-board-id=ff,qmi-chip-id=120'
- 'bus=snoc,qmi-board-id=ff'

For the reference, the board is identified by the driver in the
following way:

ath10k_snoc c800000.wifi: qmi chip_id 0x120 chip_family 0x4007 board_id 0xff soc_id 0x40670000
ath10k_snoc c800000.wifi: qmi fw_version 0x337302d3 fw_build_timestamp 2023-01-06 01:50 fw_build_id QC_IMAGE_VERSION_STRING=WLAN.HL.3.3.7.c2-00723-QCAHLSWMTPLZ-1
ath10k_snoc c800000.wifi: wcn3990 hw1.0 target 0x00000008 chip_id 0x00000000 sub 0000:0000
ath10k_snoc c800000.wifi: kconfig debug 0 debugfs 0 tracing 0 dfs 0 testmode 0
ath10k_snoc c800000.wifi: firmware ver  api 5 features wowlan,mgmt-tx-by-reference,non-bmi crc32 b3d4b790
ath10k_snoc c800000.wifi: htt-ver 3.114 wmi-op 4 htt-op 3 cal file max-sta 32 raw 0 hwcrypto 1

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20231125-topic-rb1_feat-v3-12-4cbb567743bb@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>