wifi: ath12k: Introduce the container for mac80211 hw

To support multi link operation, we need to combine all the link/pdev
under a single wiphy. This avoids the overhead of synchronization
across multiple hardware instances in both the cfg80211 and mac80211
layers. Currently, each link/pdev is registered as separate wiphy,
tightly coupled with link/pdev/radio (ar) structure. To enable single
wiphy registration within the chip, we decouple the wiphy data entity from
the link/pdev/radio (ar) structure and move it under the chip (ab)
structure with a new data container (ath12k_hw) structure. This approach
improves scalability for future multi link operation support.

		mac80211 hw private data structure diagram
		------------------------------------------

	Now						After

 +---------------------+                          +---------------------+
 |mac80211 hw priv data|                          |mac80211 hw priv data|
 |                     |                          |                     |
 |                     |                          |                     |
 |                     |                          |                     |
 |                     |                          |   ath12k_hw (ah)    |
 |                     |                          |                     |
 |                     |  +------------------->   |                     |
 |    ath12k (ar)      |                          |   +-------------+   |
 |                     |                          |   |             |   |
 |                     |                          |   | ath12k (ar) |   |
 |                     |                          |   |             |   |
 |                     |                          |   |             |   |
 |                     |                          |   +-------------+   |
 |                     |                          |                     |
 |                     |                          |                     |
 +---------------------+                          +---------------------+

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: Karthikeyan Periyasamy <quic_periyasa@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://msgid.link/20240118010320.3918136-3-quic_periyasa@quicinc.com