fbdev/da8xx-fb: Use fbdev I/O helpers

Set struct fb_ops and with FB_DEFAULT_IOMEM_OPS, fbdev's initializer
for I/O memory. Sets the callbacks to the cfb_ and fb_io_ functions.
Select the correct modules with Kconfig's FB_IOMEM_HELPERS token.

The macro and token set the currently selected values, so there is
no functional change.

v3:
	* use _IOMEM_ in commit message
v2:
	* updated to use _IOMEM_ tokens
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Helge Deller <deller@gmx.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20230803184034.6456-9-tzimmermann@suse.de

drivers/video/fbdev/Kconfig

@@ -1837,10 +1837,8 @@ config FB_DA8XX
 	tristate "DA8xx/OMAP-L1xx/AM335x Framebuffer support"
 	depends on FB && HAVE_CLK && HAS_IOMEM
 	depends on ARCH_DAVINCI_DA8XX || SOC_AM33XX || COMPILE_TEST
-	select FB_CFB_FILLRECT
-	select FB_CFB_COPYAREA
-	select FB_CFB_IMAGEBLIT
 	select FB_CFB_REV_PIXELS_IN_BYTE
+	select FB_IOMEM_HELPERS
 	select FB_MODE_HELPERS
 	select VIDEOMODE_HELPERS
 	help

drivers/video/fbdev/da8xx-fb.c

@@ -1295,14 +1295,12 @@ static int da8xxfb_set_par(struct fb_info *info)
 
 static const struct fb_ops da8xx_fb_ops = {
 	.owner = THIS_MODULE,
+	FB_DEFAULT_IOMEM_OPS,
 	.fb_check_var = fb_check_var,
 	.fb_set_par = da8xxfb_set_par,
 	.fb_setcolreg = fb_setcolreg,
 	.fb_pan_display = da8xx_pan_display,
 	.fb_ioctl = fb_ioctl,
-	.fb_fillrect = cfb_fillrect,
-	.fb_copyarea = cfb_copyarea,
-	.fb_imageblit = cfb_imageblit,
 	.fb_blank = cfb_blank,
 };