wifi: rtw89: fw: extend JOIN H2C command to support WiFi 7 chips

WiFi 7 chips will support MLD, so there are more fields about that. But
currently we don't support MLD yet, just define fields and bits by this
patch ahead, and fill STA_TYPE only.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://msgid.link/20240115033742.16372-9-pkshih@realtek.com