[CC1101] Added list of supported bandwidths (#842)

src/modules/CC1101/CC1101.h

@@ -740,7 +740,8 @@ class CC1101: public PhysicalLayer {
     int16_t setBitRate(float br);
 
     /*!
-      \brief Sets receiver bandwidth. Allowed values range from 58.0 to 812.0 kHz.
+      \brief Sets receiver bandwidth. Allowed values are 58, 68, 81, 102, 116, 135, 162,
+      203, 232, 270, 325, 406, 464, 541, 650 and 812 kHz.
       \param rxBw Receiver bandwidth to be set in kHz.
       \returns \ref status_codes
     */