set battery present only if valid SOC

Fix issue where the system would not power on if the battery was below
the low safety cutoff threshold, as we would detect the battery and mark
it as present, however the battery cutoff fet would still keep the
battery disabled as it was in precharge.

This would prevent the system from powering on.

Signed-off-by: Kieran Levin <ktl@frame.work>

Author: kiram9

board/hx20/cypress5525.c

@@ -357,7 +357,8 @@ void cypd_update_power(void)
 	}
 
 	if (extpower_is_present() ||
-	 charger_current_battery_params()->flags & BATT_FLAG_RESPONSIVE)
+	 (charger_current_battery_params()->flags & BATT_FLAG_RESPONSIVE &&
+		 charger_current_battery_params()->state_of_charge > 0))
 		system_power_present = 1;
 	else
 		system_power_present = 0;
@@ -368,7 +369,8 @@ int cypd_update_power_status(void)
 	int i;
 	int rv = EC_SUCCESS;
 	int power_stat = 0;
-	if (charger_current_battery_params()->flags & BATT_FLAG_RESPONSIVE) {
+	if (charger_current_battery_params()->flags & BATT_FLAG_RESPONSIVE &&
+		charger_current_battery_params()->state_of_charge > 0) {
 		power_stat |= BIT(3);
 	}
 	if (extpower_is_present()) {