wifi: ath11k: wmi: add unified command debug messages

Add debug messages for every command and cleanup the existing ones to make them
all follow the same style. For better readability start every message with
"cmd". Print the debug message after a successful ath11k_wmi_cmd_send() call.

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/20230609142440.24643-9-kvalo@kernel.org