ipa: Reduce the throttling of the IPA msges

This code used to be a sleep, it was changed to be a timer by Andreas
but this timer does not seem to have any use. When doing the sw load
this timer is increasing the upload time dramatically, reduce it to
make it work faster.
diff --git a/openbsc/src/input/ipaccess.c b/openbsc/src/input/ipaccess.c
index de5149c..91d267c 100644
--- a/openbsc/src/input/ipaccess.c
+++ b/openbsc/src/input/ipaccess.c
@@ -466,7 +466,7 @@
 	/* set tx delay timer for next event */
 	e1i_ts->sign.tx_timer.cb = timeout_ts1_write;
 	e1i_ts->sign.tx_timer.data = e1i_ts;
-	bsc_schedule_timer(&e1i_ts->sign.tx_timer, 0, 100000);
+	bsc_schedule_timer(&e1i_ts->sign.tx_timer, 0, 100);
 
 	return ret;
 }