staging: rtl8192e: remove braces from single-line block

This removes the braces from the if statement that checks the
wps_ie_len and ieee->wps_ie values in rtllib_association_req of
rtllib_softmac.c as this block contains only one statement.
Fixes a checkpatch warning.

Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Link: https://lore.kernel.org/r/20210207225703.114229-1-phil@philpotter.co.uk


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