fbdev: make fb_append_extra_logo() depend on fb=y

We can't show the extra logo from boot code if FB is built as a module.
Make the FB_LOGO_EXTRA depend on FB=y.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/video/logo/Kconfig

@@ -12,7 +12,7 @@ if LOGO
 
 config FB_LOGO_EXTRA
 	bool
-	depends on FB
+	depends on FB=y
 	default y if SPU_BASE
 
 config LOGO_LINUX_MONO