rtw89: add AXIDMA and TX FIFO dump in mac_mem_dump

The AXIDMA is tx/rx packet transmission between PCIE host
and device, and TX FIFO is MAC TX data.
We dump them to verify that these memory buffers are correct.

Signed-off-by: Chia-Yuan Li <leo.li@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Reviewed-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20211122021129.4339-1-pkshih@realtek.com