drm/gma500/cdv: Make use of the generic clock code

Add chip specific callbacks for the generic and non-generic clock
calculation code. Also remove as much dupilicated code as possible.

Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>

drivers/gpu/drm/gma500/cdv_device.c

@@ -641,6 +641,7 @@ const struct psb_ops cdv_chip_ops = {
 
 	.crtc_helper = &cdv_intel_helper_funcs,
 	.crtc_funcs = &cdv_intel_crtc_funcs,
+	.clock_funcs = &cdv_clock_funcs,
 
 	.output_init = cdv_output_init,
 	.hotplug = cdv_hotplug_event,