Add PINIO 3 & 4

There are plenty of flight controllers around now that use PINIO 1 and 2 internally for camera switching and switchable VTx power. This left no scope for user definable PINIO. A friend wanted to control a Caddx Peanut on such an FC. So I have implemented USER 3 and USER 4 PINIO options. Also in the PR is the target that was created for my friend.

src/main/programming/logic_condition.c

@@ -688,6 +688,10 @@ static int logicConditionGetFlightModeOperandValue(int operand) {
             return IS_RC_MODE_ACTIVE(BOXUSER3);
             break;
 
+        case LOGIC_CONDITION_OPERAND_FLIGHT_MODE_USER4:
+            return IS_RC_MODE_ACTIVE(BOXUSER4);
+            break;
+
         default:
             return 0;
             break;