mainboards: Drop stale comment about enumerate_buses()

There is no enumerate_buses() today and also no trace of it in our
repository. Also, in current terms, mainboard_enable() is called
as the very first thing in our enumeration so the comment seems
misleading.

Change-Id: Iae620f83c8166c1cfc8b9fb9ef4a7025987bf1be
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79003
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>

src/mainboard/kontron/986lcd-m/mainboard.c

@@ -121,9 +121,6 @@ static void hwm_setup(void)
 	pnp_write_hwm5_index(hwm_base, 0x40, 0x01); /* Init, but no SMI# */
 }
 
-/* mainboard_enable is executed as first thing after */
-/* enumerate_buses(). */
-
 static void mainboard_enable(struct device *dev)
 {
 	install_intel_vga_int15_handler(GMA_INT15_ACTIVE_LFP_INT_LVDS, GMA_INT15_PANEL_FIT_DEFAULT, GMA_INT15_BOOT_DISPLAY_DEFAULT, 3);