bootmode: Get rid of CONFIG_BOOTMODE_STRAPS

With VBOOT_VERIFY_FIRMWARE separated from CHROMEOS, move recovery and
developer mode check functions to vboot. Thus, get rid of the
BOOTMODE_STRAPS option which controlled these functions under src/lib.

BUG=chrome-os-partner:55639

Change-Id: Ia2571026ce8976856add01095cc6be415d2be22e
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/15868
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/northbridge/intel/haswell/gma.c

@@ -457,7 +457,7 @@ static void gma_func0_init(struct device *dev)
 	dp.panel_power_cycle_delay = conf->gpu_panel_power_cycle_delay;
 
 #if IS_ENABLED(CONFIG_CHROMEOS)
-	init_fb = developer_mode_enabled() || recovery_mode_enabled();
+	init_fb = display_init_required();
 #endif
 	lightup_ok = panel_lightup(&dp, init_fb);
 		gfx_set_init_done(1);