staging: emxx_udc: lines should not end with parenthesis

Adjust code to meet the style of “lines should not end with
parenthesis”.

Signed-off-by: Payal Kshirsagar <payal.s.kshirsagar.98@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>