linux-imx

drm: omapdrm: Avoid function forward declaration in omap_crtc.c

Move the set_enabled function to avoid the forward declaration. While at
it prefix it with omap_crtc_ like most other functions in the file, and
fix the comment stating in which contexts the function is called.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>