vga_switcheroo: disable default y by new rules.

Another undocumented rule of kernel folklore, no default y
config options anymore, apparantly hinting to distros they might
want something isn't preferred anymore.
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/vga/Kconfig

@@ -11,7 +11,6 @@ config VGA_ARB
 
 config VGA_SWITCHEROO
 	bool "Laptop Hybrid Grapics - GPU switching support"
-	default y
 	depends on X86
 	depends on ACPI
 	help