Add support for freeNode to EEPROM

ROM.h

@@ -27,9 +27,11 @@
 	#define PRODUCT_H32_V2 0xC0
 	#define PRODUCT_H32_V3 0xC1
     #define PRODUCT_RAK4631 0x10
+    #define PRODUCT_FREENODE 0x20
     #define MODEL_11 0x11
     #define MODEL_12 0x12
-	#define MODEL_A1 0xA1
+    #define MODEL_21 0x21 // European band, 868MHz
+    #define MODEL_A1 0xA1
 	#define MODEL_A6 0xA6
 	#define MODEL_A4 0xA4
 	#define MODEL_A9 0xA9

Utilities.h

@@ -980,6 +980,14 @@ void setTXPower(RadioInterface* radio, int txp) {
         }
     }
 
+    if (model == MODEL_21) {
+        if (interfaces[radio->getIndex()] == SX128X) {
+            radio->setTxPower(txp, PA_OUTPUT_PA_BOOST_PIN);
+        } else {
+            radio->setTxPower(txp, PA_OUTPUT_RFO_PIN);
+        }
+    }
+
     if (model == MODEL_A1) radio->setTxPower(txp, PA_OUTPUT_PA_BOOST_PIN);
     if (model == MODEL_A2) radio->setTxPower(txp, PA_OUTPUT_PA_BOOST_PIN);
     if (model == MODEL_A3) radio->setTxPower(txp, PA_OUTPUT_RFO_PIN);
@@ -1310,7 +1318,7 @@ bool eeprom_product_valid() {
 	#if PLATFORM == PLATFORM_ESP32
 	if (rval == PRODUCT_RNODE || rval == BOARD_RNODE_NG_20 || rval == BOARD_RNODE_NG_21 || rval == PRODUCT_HMBRW || rval == PRODUCT_TBEAM || rval == PRODUCT_T32_10 || rval == PRODUCT_T32_20 || rval == PRODUCT_T32_21 || rval == PRODUCT_H32_V2 || rval == PRODUCT_H32_V3) {
 	#elif PLATFORM == PLATFORM_NRF52
-	if (rval == PRODUCT_RAK4631 || rval == PRODUCT_HMBRW) {
+	if (rval == PRODUCT_RAK4631 || rval == PRODUCT_HMBRW || rval == PRODUCT_FREENODE) {
 	#else
 	if (false) {
 	#endif
@@ -1350,6 +1358,8 @@ bool eeprom_model_valid() {
 	if (model == MODEL_C5 || model == MODEL_CA) {
     #elif BOARD_MODEL == BOARD_RAK4631
     if (model == MODEL_11 || model == MODEL_12) {
+    #elif BOARD_MODEL == BOARD_FREENODE
+    if (model == MODEL_21) {
 	#elif BOARD_MODEL == BOARD_HUZZAH32
 	if (model == MODEL_FF) {
 	#elif BOARD_MODEL == BOARD_GENERIC_ESP32