V2X2: new subprotocol JXD506

Protocol number: 5
Subprotocol: 1

Multiprotocol/Multiprotocol.h

@@ -154,6 +154,11 @@ enum HONTAI
 	FORMAT_JJRCX1	= 1,
 	FORMAT_X5C1		= 2
 };
+enum V2X2
+{
+	V2X2	= 0,
+	JXD506	= 1,
+};
 
 #define NONE 		0
 #define P_HIGH		1
@@ -490,6 +495,10 @@ Serial: 100000 Baud 8e2      _ xxxx xxxx p --
 			PPM_IBUS	1
 			PWM_SBUS	2
 			PPM_SBUS	3
+		sub_protocol==V2X2
+			V2X2		0
+			JXD506		1
+
    Power value => 0x80	0=High/1=Low
   Stream[3]   = option_protocol;
    option_protocol value is -127..127