As per tovalds/linux, the kernel version below 4.14 support
	fd_update_calibration(unsigned long arg)
and not
	fd_update_calibration(struct timer_list *arg)
But even though CS7 is 3.10 based, patches might
have been backported, and it supports the latest one.
Signed-off-by: Vaibhav Gupta <vaibhav.gupta@cern.ch>