intel_adsp/cavs: power: Restore interruptions after sleep

Explicitly restore interruptions in pm_state_exit_post_ops.

Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>

soc/xtensa/intel_adsp/cavs/power.c

@@ -183,6 +183,12 @@ void pm_state_exit_post_ops(enum pm_state state, uint8_t substate_id)
 	} else {
 		__ASSERT(false, "invalid argument - unsupported power state");
 	}
+
+	/**
+	 * We don't have the key used to lock interruptions here.
+	 * Just set PS.INTLEVEL to 0.
+	 */
+	__asm__ volatile ("rsil a2, 0");
 }
 #endif /* CONFIG_PM */