light: downgrade hardware open error

If a certain type of light isn't available, we want to indicate this,
but it isn't an error.

Bug: N/A (was asked to do this for some fixit)
Test: N/A
Change-Id: I69038964db22425a7e9b2c722ddd4f38bf5bea2e
diff --git a/light/2.0/default/Light.cpp b/light/2.0/default/Light.cpp
index 5484d2d..3febf6b 100644
--- a/light/2.0/default/Light.cpp
+++ b/light/2.0/default/Light.cpp
@@ -140,7 +140,7 @@
         ret = hwModule->methods->open(hwModule, name,
             reinterpret_cast<hw_device_t**>(&lightDevice));
         if (ret != 0) {
-            ALOGE("light_open %s %s failed: %d", LIGHTS_HARDWARE_MODULE_ID, name, ret);
+            ALOGI("light_open %s %s failed: %d", LIGHTS_HARDWARE_MODULE_ID, name, ret);
         }
     } else {
         ALOGE("hw_get_module %s %s failed: %d", LIGHTS_HARDWARE_MODULE_ID, name, ret);