fbdev/hecubafb: Select FB_SYS_HELPERS_DEFERRED

The Kconfig token FB_SYS_HELPERS_DEFERRED selects everything that
is required for deferred I/O on system-memory framebuffers. Select
it from FB_HECUBA.

Deferred I/O helpers were previously selected by n411, which builds
upon hecubafb. Remove these select statements in favor of the new one.
N411 does not implement any framebuffer I/O by itself.
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/20230706151432.20674-4-tzimmermann@suse.de

drivers/video/fbdev/Kconfig

@@ -192,7 +192,7 @@ config FB_SYS_HELPERS_DEFERRED
 config FB_HECUBA
 	tristate
 	depends on FB
-	depends on FB_DEFERRED_IO
+	select FB_SYS_HELPERS_DEFERRED
 
 config FB_SVGALIB
 	tristate
@@ -683,11 +683,6 @@ config FB_EFI
 config FB_N411
 	tristate "N411 Apollo/Hecuba devkit support"
 	depends on FB && X86 && MMU
-	select FB_SYS_FILLRECT
-	select FB_SYS_COPYAREA
-	select FB_SYS_IMAGEBLIT
-	select FB_SYS_FOPS
-	select FB_DEFERRED_IO
 	select FB_HECUBA
 	help
 	  This enables support for the Apollo display controller in its