Configure lpm idle timeout

Bug: 279551091
Test: Manual BT Test cases
Change-Id: I18a5e7ecbe67c2f288236ba6f4cbc6608fc0ad42
diff --git a/src/hardware.c b/src/hardware.c
index 8f96d60..415bddb 100644
--- a/src/hardware.c
+++ b/src/hardware.c
@@ -1240,6 +1240,8 @@
         timeout_ms *= 50;
     else if (strstr(hw_cfg_cb.local_chip_name, "BCM43013") != NULL)
         timeout_ms *= 1;
+     else if (strstr(hw_cfg_cb.local_chip_name, "BCM4381") != NULL)
+        timeout_ms *= 1;
     else
         timeout_ms *= 300;