staging: rtl8712: rtl871x_ioctl_linux.c: Cleaning up useless if statement

The same code regardless of the outcome of the if statement.
And clean up another duplicate line of code.

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>