video: logo: LOGO should depend on FB_CORE i.s.o. FB

If CONFIG_FB_CORE=y and CONFIG_FB=n, the frame buffer bootup logos can
no longer be enabled. Fix this by making CONFIG_LOGO depend on
CONFIG_FB_CORE instead of CONFIG_FB, as there is no good reason for the
logo code to depend on the presence of real frame buffer device drivers.

Fixes: 55bffc8170bb ("fbdev: Split frame buffer support in FB and FB_CORE symbols")
Signed-off-by: Geert Uytterhoeven <[e-mail]>
Reviewed-by: Javier Martinez Canillas <[e-mail]>
Signed-off-by: Javier Martinez Canillas <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/e4142[e-mail]

drivers/video/Kconfig

···
 	source "drivers/video/console/Kconfig"
 endif
 
-if FB || SGI_NEWPORT_CONSOLE
+if FB_CORE || SGI_NEWPORT_CONSOLE
 	source "drivers/video/logo/Kconfig"
 
 endif

drivers/video/logo/Kconfig

···
 
 menuconfig LOGO
 	bool "Bootup logo"
-	depends on FB || SGI_NEWPORT_CONSOLE
+	depends on FB_CORE || SGI_NEWPORT_CONSOLE
 	help
 	  Enable and select frame buffer bootup logos.