wifi: rtw89: add use of pkt_list offload to debug entry

Driver can prepare pkt_list for firmware that only uses them to send out
the packets in specific situations. To understand the usage of current
status, and to check if there is leakage problem, dump bitmap and the
indices used by certain function.

An example looks like:

  map:
		...
        pkt_ofld:  3f 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ...
                [SCAN 0]: 3
                [SCAN 1]: 4
                [SCAN 3]: 5
  VIF [0] xx:xx:xx:xx:xx:xx
		...
        pkt_ofld[GENERAL]: 0 1 2

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230123065401.14174-4-pkshih@realtek.com