RF PHY extension update

Added support to check RF extension support for dynamic CSMA and timing
informatiuon is available

Added support to read next informations: 
* RX time stamp and TX finished timestamp
* symbols/second constant which helps to convert symbols to real time

Added Support to write:
* CSMA backoff time and CCA mode

Author: Juha Heiskanen

nanostack/platform/arm_hal_phy.h

@@ -58,7 +58,12 @@ typedef enum {
     PHY_EXTENSION_CONVERT_SIGNAL_INFO, /**< Convert signal info. */
     PHY_EXTENSION_ACCEPT_ANY_BEACON, /**< Set boolean true or false for accept beacon from other Pan-ID than configured. Default value should be false */
     PHY_EXTENSION_SET_TX_TIME,  /**< Net library sets transmission time based on global time stamp. Max. 65ms from setting to TX. If TX time is set to zero, it should be ignored.*/
-    PHY_EXTENSION_READ_RX_TIME, /**< Read the time of last reception based on global time stamp. */
+    PHY_EXTENSION_READ_RX_TIME, /**< Read the time of last reception based on global symbol time stamp. */
+    PHY_EXTENSION_READ_TX_FINNISH_TIME, /**< Read the time of last finished TX symbol based on global time stamp. */
+    PHY_EXTENSION_DYNAMIC_RF_SUPPORTED, /**< Read status for support Radio driver support for set TX time, CCA and Timestamp read. Also PHY_LINK_CCA_PREPARE tx status must be supported also*/
+    PHY_EXTENSION_GET_TIMESTAMP, /**<  Read 32-bit constant monotonic time stamp in us */
+    PHY_EXTENSION_SET_CSMA_PARAMETERS, /**< CSMA parameter's: Include 32-bit backoff time in us and CCA mode used after timeout CCA is boolean true do normal CCA and false start TX direct*/
+    PHY_EXTENSION_GET_SYMBOLS_IN_SECOND, /**<  Read Symbols per seconds which will help to convert symbol time to real time  */
 } phy_extension_type_e;
 
 /** Address types */