User controllable serial port power.

Thx to @raphaelcoeffic for numerous tips with YAML.
Tested with TX16S mkII.

radio/src/storage/yaml/yaml_datastructs_x12s.cpp

@@ -442,7 +442,7 @@ static const struct YamlNode struct_RadioData[] = {
   YAML_ARRAY("customFn", 72, 64, struct_CustomFunctionData, cfn_is_active),
   YAML_CUSTOM("auxSerialMode",r_serialMode,nullptr),
   YAML_CUSTOM("aux2SerialMode",r_serialMode,nullptr),
-  YAML_ARRAY("serialPort", 4, 4, struct_serialConfig, nullptr),
+  YAML_ARRAY("serialPort", 8, 4, struct_serialConfig, nullptr),
   YAML_ARRAY("sticksConfig", 0, 4, struct_sticksConfig, stick_name_valid),
   YAML_ARRAY("switchConfig", 2, 16, struct_switchConfig, nullptr),
   YAML_ARRAY("potsConfig", 2, 8, struct_potConfig, nullptr),
@@ -457,7 +457,7 @@ static const struct YamlNode struct_RadioData[] = {
   YAML_STRUCT("themeData", 480, struct_OpenTxTheme__PersistentData, NULL),
   YAML_STRING("ownerRegistrationID", 8),
   YAML_SIGNED( "uartSampleMode", 2 ),
-  YAML_PADDING( 5 ),
+  YAML_PADDING( 6 ),
   YAML_END
 };
 static const struct YamlNode struct_unsigned_8[] = {