staging: wilc1000: Remove unnecessary braces {} around single statement block

Remove unnecessary braces {} around an 'if' statement block with a single
statement. Issue found by checkpatch.

Signed-off-by: Eyal Ilsar <edilsar@gmail.com>
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>