wifi: rtw88: fix typo rtw8822cu_probe

The probe function of 8822cu is misplaced to 8822bu, so we fix it. Just
cosmetics, no changes in functionality.

Signed-off-by: Po-Hao Huang <phhuang@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/20230825062404.50813-1-pkshih@realtek.com