mb/google/hatch/dratini: increase power enable to reset deassert delay

With 1ms delay, reset is de-asserted too soon, before power is fully
up, causing a glitch to the reset signal. The issue is resolved with
4ms delay.

TEST=tested on dratini device and observed the issue is resolved.
BUG=b:260253945

Change-Id: I5c3edbc6ac90d5042c2d3c5b01573d4bb1ea676d
Signed-off-by: Eran Mitrani <mitrani@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/70666
Reviewed-by: Tarun Tuli <taruntuli@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/hatch/variants/dratini/ramstage.c

@@ -14,6 +14,6 @@ void variant_ramstage_init(void)
 	 * a minimum of 400us on Kohaku.
 	 */
 	gpio_output(GPP_C11, 1);
-	mdelay(1);
+	mdelay(4);
 	gpio_output(GPP_A12, 1);
 }