staging: r8188eu: remove unnecessary braces in if statements

Braces are not necessary for single statement blocks.

Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Marcelo Aloisio da Silva <marcelo.as@aol.com>
Link: https://lore.kernel.org/r/20220220174150.GA11496@snoopy


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