wifi: ath12k: fix PCI read and write

Currently, PCI read is failing for the registers belonging to
SECURITY_CONTROL_WLAN registers. These registers read is required
to read the board-id to identify the dual-mac QCN9274 hardware.

The failure is because, for these registers (SECURITY_CONTROL_WLAN)
offset, ath12k_pci_get_window_start() returns window_start as 0. Due
to this PCI read is done without PCI select window and with
window_start offset as 0.

Hence, fix PCI read and write by doing PCI select window and by using
the correct window_start offset - WINDOW_START for
SECURITY_CONTROL_WLAN registers.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.1.1-00188-QCAHKSWPL_SILICONZ-1
Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-QCAHKSWPL_SILICONZ-1
Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3

Signed-off-by: P Praneesh <[email protected]>
Co-developed-by: Karthikeyan Periyasamy <[email protected]>
Signed-off-by: Karthikeyan Periyasamy <[email protected]>
Signed-off-by: Raj Kumar Bhagat <[email protected]>
Acked-by: Jeff Johnson <[email protected]>
Signed-off-by: Kalle Valo <[email protected]>
Link: https://msgid.link/[email protected]

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