libpayload/x86/delay: Make arch_ndelay call apic_delay if delay is long

This reduces power consumption on grunt by over 3W when sitting at the
depthcharge recovery screen.

BUG=b:109749762
TEST=Booted grunt in the recovery screen and made sure it continued to
work.

Change-Id: Id079c099ee4cf6a07724241af4400063f4551668
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Reviewed-on: https://review.coreboot.org/28245
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: Richard Spiegel <richard.spiegel@silverbackltd.com>
Reviewed-by: Julius Werner <jwerner@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

payloads/libpayload/arch/x86/apic.c

@@ -210,6 +210,8 @@ static void apic_init_timer(void)
 		/* Set APIC init counter to MAX and count for 1 ms */
 		apic_write32(APIC_TIMER_INIT_COUNT, UINT32_MAX);
 
+		/* This is safe because apic_initialized() returns false so
+		 * arch_ndelay() falls back to a busy loop. */
 		mdelay(1);
 
 		ticks_per_ms =