fwk: dogwood: Fix DVT1 suspend

We used to have nice code that prevented all the 5vsb stuff
from happening in suspend, but that has since bitrotted since
we always forget to test it, so it's been broken for quite a
few versions.

Add the check back so we don't have the issue.

Let's also add more printouts so we know what's going on.

BUG=DVT1 boards cannot suspend
TEST=DVT1 boards can suspend
TEST=DVT2 boards can still suspend with force_psu_on
TEST=Newer boards suspend nicely too
BRANCH=fwk-dogwood-27111

Author: amstan

zephyr/program/framework/dogwood/src/power_sequence.c

@@ -365,13 +365,19 @@ DECLARE_DEFERRED(system_hang_detect);
 
 void power_5vsb_enter(void)
 {
-	/* Don't enter 5vsb if the user forces enabling PSU */
-	if (force_enable_psu)
-		return;
-
 	CPRINTS("current was low (<%dmA) for a long time, switching to 5vsb",
 			INA236_MONITOR_5V_LOWER_CURRENT_MA);
 
+	if (board_get_version() < BOARD_VERSION_8) {
+		CPRINTS("...this board is too old to turn power supply off");
+		return;
+	}
+
+	if (force_enable_psu) {
+		CPRINTS("...but we want to force power supply on");
+		return;
+	}
+
 	gpio_pin_set_dt(GPIO_DT_FROM_NODELABEL(gpio_en_s0ix), 1);
 
 	k_msleep(20);
@@ -402,6 +408,11 @@ bool power_5vsb_exit(void)
 	if (!power_enable_psu(1))
 		return false;
 
+	if (board_get_version() < BOARD_VERSION_8) {
+		CPRINTS("...power supply was already forced on because board is old");
+		return true;
+	}
+
 	k_msleep(10);
 	gpio_pin_set_dt(GPIO_DT_FROM_NODELABEL(gpio_en_rvsp_l), 1);
 	CPRINTS("switched to high power rails");