wifi: rtw89: 8922d: enable Makefile and Kconfig for RTL8922DE

RTL8922DE is a WiFi 7 chipset, supporting 2x2 2GHz/5GHz/6GHz 4096/1024-QAM
160MHz channels. As STA, AP and P2P modes work well, enable this chipset.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20260730060220.55844-8-pkshih@realtek.com