staging: rtl8188eu: rtw_init_cmd_priv never fails

Change the return type to void. Remove unnecessary error handling.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20210505202622.11087-2-martin@kaiser.cx


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>