net: ipa: change stop channel retry delay

If a GSI stop channel command leaves the channel in STOP_IN_PROC
state, we retry the stop command after a 1-2 millisecond delay.

I have been told that a 3-5 millisecond delay is a better choice.
Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ipa/gsi.c

@@ -903,7 +903,7 @@ int gsi_channel_stop(struct gsi *gsi, u32 channel_id)
 		ret = gsi_channel_stop_command(channel);
 		if (ret != -EAGAIN)
 			break;
-		usleep_range(USEC_PER_MSEC, 2 * USEC_PER_MSEC);
+		usleep_range(3 * USEC_PER_MSEC, 5 * USEC_PER_MSEC);
 	} while (retries--);
 
 	mutex_unlock(&gsi->mutex);