staging: dgap: removes KERNEL_VERSION conditionals

This patch removes the KERNEL_VERSION conditionals.
The driver is built for this kernel version, so the
conditionals are not needed.

Signed-off-by: Lidza Louina <Lidza.Louina@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>