Staging: emxx_udc: Convert from __attribute__((aligned(size))) to __aligned(size)

This patch addresses the checkpatch.pl warning
WARNING: __aligned(size) is preferred over __attribute__((aligned(size)))

aligned(x) is a macro :
#define __aligned(x)                   __attribute__((aligned(x)))

Signed-off-by: Vatika Harlalka <vatikaharlalka@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>