libbladeRF: Load LMS DC cal registers every time init_device() is called

Addresses issue #370.

The LMS calibration registers must be loaded each time init_device() is
called, as opposed to only during the post-FPGA load init, because the
the user may have updated his or her calibration table since then.

host/libraries/libbladeRF/src/bladerf_priv.c

@@ -240,11 +240,17 @@ int init_device(struct bladerf *dev)
             return status;
         }
 
-        /* Set up LMS DC offset register calibration and initial IQ settings,
-         * if any tables have been loaded already */
-        status = apply_lms_dc_cals(dev);
     }
 
+    /* Set up LMS DC offset register calibration and initial IQ settings,
+     * if any tables have been loaded already.
+     *
+     * This is done every time the device is opened (with an FPGA loaded),
+     * as the user may change/update DC calibration tables without reloading the
+     * FPGA.
+     */
+    status = apply_lms_dc_cals(dev);
+
     return status;
 }