fbdev/pxafb: 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/20230803184034.6456-36-tzimmermann@suse.de

drivers/video/fbdev/Kconfig

@@ -1580,9 +1580,7 @@ config FB_PXA168
 config FB_PXA
 	tristate "PXA LCD framebuffer support"
 	depends on FB && ARCH_PXA
-	select FB_CFB_FILLRECT
-	select FB_CFB_COPYAREA
-	select FB_CFB_IMAGEBLIT
+	select FB_IOMEM_HELPERS
 	select VIDEOMODE_HELPERS if OF
 	select FB_MODE_HELPERS if OF
 	help

drivers/video/fbdev/pxafb.c

@@ -599,13 +599,11 @@ static int pxafb_blank(int blank, struct fb_info *info)
 
 static const struct fb_ops pxafb_ops = {
 	.owner		= THIS_MODULE,
+	FB_DEFAULT_IOMEM_OPS,
 	.fb_check_var	= pxafb_check_var,
 	.fb_set_par	= pxafb_set_par,
 	.fb_pan_display	= pxafb_pan_display,
 	.fb_setcolreg	= pxafb_setcolreg,
-	.fb_fillrect	= cfb_fillrect,
-	.fb_copyarea	= cfb_copyarea,
-	.fb_imageblit	= cfb_imageblit,
 	.fb_blank	= pxafb_blank,
 };