FM power on/off sequence changes for cherokee

This include adding fmhal service for access RFKill driver
to do power ON/OFF operations during FM enable/disable.

Change-Id: I77c100533ca47bf0e53bccdbb1d93c08058df4bf
diff --git a/helium/radio-helium.h b/helium/radio-helium.h
index 05fc309..989bb55 100644
--- a/helium/radio-helium.h
+++ b/helium/radio-helium.h
@@ -140,6 +140,7 @@
 /* HCI timeouts */
 #define RADIO_HCI_TIMEOUT   (10000) /* 10 seconds */
 
+#define ECC_EVENT_BUFSIZE   12
 typedef enum {
     ASSOCIATE_JVM,
     DISASSOCIATE_JVM