drivers/isdn: delete 'break' after 'return'

delete 'break' statement after 'return' statement

Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/isdn/i4l/isdn_tty.c b/drivers/isdn/i4l/isdn_tty.c
index d8a7d83..925a7ed4 100644
--- a/drivers/isdn/i4l/isdn_tty.c
+++ b/drivers/isdn/i4l/isdn_tty.c
@@ -3425,7 +3425,6 @@
 			p++;
 			isdn_tty_cmd_ATA(info);
 			return;
-			break;
 		case 'D':
 			/* D - Dial */
 			if (info->msr & UART_MSR_DCD)