MLK-15986-4: video: fbdev: Separate display framework code from fb driver code

MLK-15986-4: video: fbdev: Separate display framework code from fb driver code

The display driver framework code in drivers/video/fbdev/mxc/mxc_dispdrv.c
is currently compiled along with fb driver code in
drivers/video/fbdev/mxc. This is a framework that is also used by another
fb driver that can be found in drivers/video/fbdev/mxsfb.c.

This patch separates the framework compilation by pulling it into its
own CONFIG_FB_MXC_DISP_FRAMEWORK that can be selected by any fb driver
and/or panel whose implementation relies on this framework.

Signed-off-by: Cristina Ciocan <cristina-mihaela.ciocan@nxp.com>