matlab: add missing BB_TXVGA1_RXLPF loopback option

Fixes Nuand#478

Author: rtucker

host/libraries/libbladeRF_bindings/matlab/bladeRF.m

@@ -90,7 +90,7 @@
     end
 
     properties(Dependent)
-        loopback    % Loopback mode. Available options: 'NONE', 'FIRMWARE', 'BB_TXLPF_RXVGA2', 'BB_TXVGA1_RXVGA2', 'BB_TXLPF_RXLPF', 'RF_LNA1', 'RF_LNA2', 'RF_LNA3'
+        loopback    % Loopback mode. Available options: 'NONE', 'FIRMWARE', 'BB_TXLPF_RXVGA2', 'BB_TXVGA1_RXVGA2', 'BB_TXLPF_RXLPF', 'BB_TXVGA1_RXLPF', 'RF_LNA1', 'RF_LNA2', 'RF_LNA3'
     end
 
     properties(SetAccess=immutable)

host/libraries/libbladeRF_bindings/matlab/bladeRF_Simulink.m

@@ -136,7 +136,7 @@
         loopback_modeSet = matlab.system.StringSet({
             'None', ...
             'BB_TXLPF_RXVGA2', 'BB_TXVGA1_RXVGA2', 'BB_TXLPF_RXLPF', ...
-            'RF_LNA1', 'RF_LNA2', 'RF_LNA3', ...
+            'BB_TXVGA1_RXLPF', 'RF_LNA1', 'RF_LNA2', 'RF_LNA3', ...
             'Firmware'
         });