backports: check for define in module_driver and not kernel version

backports: check for define in module_driver and not kernel version

In some places backports checked for the kernel version on weather to
add a own define for module_driver or not. This patch makes it check if
there is already one or not.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>