LimeSDR: set approximate tx offset value to make GSM work

may be fine-tuned in the future

Modified to match current master by Harald Welte.

Change-Id: Ied215ca9e9d9c346c2a654f96785d1b87b075129
diff --git a/Transceiver52M/UHDDevice.cpp b/Transceiver52M/UHDDevice.cpp
index a766ddc..9ab96f6 100644
--- a/Transceiver52M/UHDDevice.cpp
+++ b/Transceiver52M/UHDDevice.cpp
@@ -130,7 +130,7 @@
 	{ std::make_tuple(UMTRX, 1, 1), { 2, 0.0,  GSMRATE, 9.9692e-5,  "UmTRX 1 SPS"        } },
 	{ std::make_tuple(UMTRX, 4, 1), { 2, 0.0,  GSMRATE, 7.3846e-5,  "UmTRX 4/1 Tx/Rx SPS"} },
 	{ std::make_tuple(UMTRX, 4, 4), { 2, 0.0,  GSMRATE, 5.1503e-5,  "UmTRX 4 SPS"        } },
-	{ std::make_tuple(LIMESDR, 4, 4), { 1, GSMRATE*32, GSMRATE, 16.5/GSMRATE, "STREAM/LimeSDR (4 SPS TX/RX)" } },
+	{ std::make_tuple(LIMESDR, 4, 4), { 1, GSMRATE*32, GSMRATE, 8.9e-5, "LimeSDR 4 SPS"  } },
 	{ std::make_tuple(B2XX_MCBTS, 4, 4), { 1, 51.2e6, MCBTS_SPACING*4, B2XX_TIMING_MCBTS, "B200/B210 4 SPS Multi-ARFCN" } },
 };