sparc: Fix undefined reference to fb_is_primary_device

Commit 55bffc8 ("fbdev: Split frame buffer support in FB and FB_CORE
symbols") added a new FB_CORE Kconfig symbol, that can be enabled to only
have fbcon/VT and DRM fbdev emulation, but without support for any legacy
fbdev driver.

Unfortunately, it missed to change the CONFIG_FB in arch/sparc makefiles,
which leads to the following linking error in some sparc64 configurations:

   sparc64-linux-ld: drivers/video/fbdev/core/fbcon.o: in function `fbcon_fb_registered':
>> fbcon.c:(.text+0x4f60): undefined reference to `fb_is_primary_device'

Fixes: 55bffc8 ("fbdev: Split frame buffer support in FB and FB_CORE symbols")
Reported-by: kernel test robot <[email protected]>
Closes: https://lore.kernel.org/r/[email protected]/
Signed-off-by: Javier Martinez Canillas <[email protected]>
Reviewed-by: Thomas Zimmermann <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Cc: <[email protected]> # v6.6+
Signed-off-by: Thomas Zimmermann <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

Author: martinezjavier

arch/sparc/Makefile

@@ -60,7 +60,7 @@ libs-y                 += arch/sparc/prom/
 libs-y                 += arch/sparc/lib/
 
 drivers-$(CONFIG_PM) += arch/sparc/power/
-drivers-$(CONFIG_FB) += arch/sparc/video/
+drivers-$(CONFIG_FB_CORE) += arch/sparc/video/
 
 boot := arch/sparc/boot
 

arch/sparc/video/Makefile

@@ -1,3 +1,3 @@
 # SPDX-License-Identifier: GPL-2.0-only
 
-obj-$(CONFIG_FB) += fbdev.o
+obj-$(CONFIG_FB_CORE) += fbdev.o