wifi: rtw89: 52c: rfk: refine MCC channel info notification

RF calibration will notify FW to backup the calibration result after it
is done on a channel. For MCC (multi-channel concurrency) flow, when we
at RTW89_ENTITY_MODE_MCC_PREPARE mode, RF calibration should execute on
second channel of MCC, i.e. RTW89_SUB_ENTITY_1, and then, notify FW to
backup the result for the second one.

Originally, the RF calibration flow only fit single channel case. We are
planning to support MCC on RTL8852C, so we refine its RF calibration flow
to fit MCC case.

Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230908031145.20931-2-pkshih@realtek.com