wifi: rtw89: 8852a: adjust ANA clock to 12M

To reduce the I/O time from power save mode for 8852a,
adjust ANA clock from 500k to 12M.

Signed-off-by: Chin-Yen Lee <timlee@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20240809072012.84152-6-pkshih@realtek.com