wifi: ath12k: move struct ath12k_hw from per device to group

wifi: ath12k: move struct ath12k_hw from per device to group

Currently, hardware abstractions (ah) of different radio bands are tightly
coupled to a single device (ab). But, with hardware device group abstraction
(ag), multiple radios across different devices in a group can form different
combinations of hardware abstractions (ah) within the group. Hence, the mapping
between ah to ab can be removed and instead it can be mapped with struct
ath12k_hw_group (ag).

Current mapping between struct ath12k_hw (ah), struct ath12k_base (ab) and struct
ath12k_hw_group (ag):

            +------------------------------------------------+
            |  +-------------------------------------+       |
            |  | +---------------+ +---------------+ |       |
            |  | |ath12k_hw (ah) | |ath12k_hw (ah) | |       |
            |  | +---------------+ +---------------+ |       |
            |  |                                     |       |
            |  |  +-----------+ |   +-----------+    |       |
            |  |  | ar (2GHz) | |   | ar (5GHz) |    |       |
            |  |  +-----------+ |   +-----------+    |       |
            |  |          Dual band device-1 (ab)    |       |
            |  +-------------------------------------+       |
            |    ath12k_hw_group (ag) based on group id      |
            +------------------------------------------------+

After hardware device group abstraction moving ah array out of ab to ag:

            +----------------------------------------------+
            |   +---------------+  +---------------+       |
            |   |ath12k_hw (ah) |  |ath12k_hw (ah) |       |
            |   +---------------+  +---------------+       |
            |  +-------------------------------------+     |
            |  | +-----------+     +-----------+     |     |
            |  | | ar (2GHz) |     | ar (5GHz) |     |     |
            |  | +-----------+     +-----------+     |     |
            |  |     Dual band device-1 (ab)         |     |
            |  +-------------------------------------+     |
            |   ath12k_hw_group (ag) based on group id     |
            +----------------------------------------------+

This decoupling of struct ath12k_hw (ah) from struct ath12k_base (ab) and
mapping it to struct ath12k_hw_group (ag) will help in forming different
combinations of multi-link devices.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.3.1-00173-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: Karthikeyan Periyasamy <quic_periyasa@quicinc.com>
Signed-off-by: Harshitha Prem <quic_hprem@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://patch.msgid.link/20241204163216.433795-6-kvalo@kernel.org
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>