audioflinger: test min HAL version instead of current

Change-Id: Ibce2353b4390329b4c1a453e829178e3986c25a7
diff --git a/services/audioflinger/AudioFlinger.cpp b/services/audioflinger/AudioFlinger.cpp
index 13514fc..68fa553 100644
--- a/services/audioflinger/AudioFlinger.cpp
+++ b/services/audioflinger/AudioFlinger.cpp
@@ -143,7 +143,7 @@
     if (rc) {
         goto out;
     }
-    if ((*dev)->common.version != AUDIO_DEVICE_API_VERSION_CURRENT) {
+    if ((*dev)->common.version < AUDIO_DEVICE_API_VERSION_MIN) {
         ALOGE("%s wrong audio hw device version %04x", __func__, (*dev)->common.version);
         rc = BAD_VALUE;
         goto out;