Use default 'alpha' value of 0

Since we don't know the RX and TX parameters of the BTS that might be used
with PCU, the MS should not adapt the TX power from the RX level. So the
MS should always transmits with same power.

Finding an 'alpha' and 'gamma' value that will result in a constant
RX level at the BTS is a task of deployment.

src/pcu_main.cpp

@@ -163,7 +163,7 @@ int main(int argc, char *argv[])
 	bts->n3101 = 10;
 	bts->n3103 = 4;
 	bts->n3105 = 8;
-	bts->alpha = 10; /* a = 1.0 */
+	bts->alpha = 0; /* a = 0.0 */
 
 	msgb_set_talloc_ctx(tall_pcu_ctx);