wifi: rtw89: 8852c: rfk: refine AGC tuning flow of DPK for irregular PA

Some hardware modules don't have good RF characteristic as regular.
It could have RF PA characteristic that current code doesn't handle
properly, and it runs into wrong DPK flow that doesn't complete DPK
resulting in bad EVM.

Signed-off-by: Chih-Kang Chang <gary.chang@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/20221216052939.9991-1-pkshih@realtek.com