fbdev/uvesafb: 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>
Cc: Michal Januszewski <spock@gentoo.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230803184034.6456-44-tzimmermann@suse.de

drivers/video/fbdev/Kconfig

@@ -438,9 +438,7 @@ config FB_UVESA
 	tristate "Userspace VESA VGA graphics support"
 	depends on FB && CONNECTOR
 	depends on !UML
-	select FB_CFB_FILLRECT
-	select FB_CFB_COPYAREA
-	select FB_CFB_IMAGEBLIT
+	select FB_IOMEM_HELPERS
 	select FB_MODE_HELPERS
 	help
 	  This is the frame buffer driver for generic VBE 2.0 compliant

drivers/video/fbdev/uvesafb.c

@@ -1416,13 +1416,11 @@ static struct fb_ops uvesafb_ops = {
 	.owner		= THIS_MODULE,
 	.fb_open	= uvesafb_open,
 	.fb_release	= uvesafb_release,
+	FB_DEFAULT_IOMEM_OPS,
 	.fb_setcolreg	= uvesafb_setcolreg,
 	.fb_setcmap	= uvesafb_setcmap,
 	.fb_pan_display	= uvesafb_pan_display,
 	.fb_blank	= uvesafb_blank,
-	.fb_fillrect	= cfb_fillrect,
-	.fb_copyarea	= cfb_copyarea,
-	.fb_imageblit	= cfb_imageblit,
 	.fb_check_var	= uvesafb_check_var,
 	.fb_set_par	= uvesafb_set_par,
 };