fix(leds): Add a missing I2C bus-lock

leds_update_power() internally accesses the I2C bus so calls to this
function need to be inside an I2C lock section.

Signed-off-by: Rahix <rahix@rahix.de>

epicardium/modules/leds.c

@@ -17,10 +17,12 @@
 static void do_update(void)
 {
 	hwlock_acquire(HWLOCK_LED);
+	hwlock_acquire(HWLOCK_I2C);
 
 	leds_update_power();
 	leds_update();
 
+	hwlock_release(HWLOCK_I2C);
 	hwlock_release(HWLOCK_LED);
 }
 

epicardium/modules/personal_state.c

@@ -125,9 +125,13 @@ void vLedTask(void *pvParameters)
 						(float)(1000 /
 							led_animation_rate))));
 			}
+
+			hwlock_acquire(HWLOCK_I2C);
+
 			leds_update_power();
 			leds_update();
 
+			hwlock_release(HWLOCK_I2C);
 			hwlock_release(HWLOCK_LED);
 		}