wifi: ath11k: htc: cleanup debug messages

Cleanup HTC debug messages to follow the preferred style and try to make them
more readable. Also add a few more and remove unnecessary.

Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.23

Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20230609142440.24643-15-kvalo@kernel.org