Refactor lid switch, disable power button when lid closed and AC disconnected

src/board/system76/darp5/power.c

@@ -2,6 +2,7 @@
 #include <arch/time.h>
 #include <board/battery.h>
 #include <board/gpio.h>
+#include <board/lid.h>
 #include <board/power.h>
 #include <board/pmc.h>
 #include <board/pnp.h>
@@ -207,6 +208,10 @@ void power_event(void) {
     // Read power switch state
     static bool ps_last = true;
     bool ps_new = gpio_get(&PWR_SW_N);
+    // Disable power button if lid is closed and AC is disconnected
+    if (!lid_state && ac_last) {
+        ps_new = true;
+    }
     if (!ps_new && ps_last) {
         // Ensure press is not spurious
         delay_ms(10);