flash Kinetis: new KVx family added

Cortex-M0+ and M4 motor control MCUs KV10, KV11, KV30, KV31,
KV42, KV44 and KV46 added to SDID identification.
Watchdog disable code changed to work on Cortex-M0+ (KV1x)
Protection size set to 1K for 16K flash devices (KV10Z16)
- cherry picked from Andrey Smirnov's change #2051

Change-Id: Ia6f4868eaf7e2cb6ad6a736210c703a67e0027be
Signed-off-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-on: http://openocd.zylin.com/3235
Tested-by: jenkins
Reviewed-by: Kyle Manna <kyle.manna@fuel7.com>
Reviewed-by: Freddie Chopin <freddie.chopin@gmail.com>

contrib/loaders/watchdog/armv7m_kinetis_wdog.s

@@ -0,0 +1,64 @@
+/***************************************************************************
+ *   Copyright (C) 2015 Tomas Vanek                                        *
+ *   vanekt@fbl.cz                                                         *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.                                        *
+ ***************************************************************************/
+
+/*
+	Disable watchdog for Kinetis Kx and KVx
+	Parameters: none
+	Used instruction set should work on both Cortex-M4 and M0+
+*/
+
+	.text
+	.syntax unified
+        .cpu cortex-m0
+	.thumb
+
+WDOG_ADDR	= 0x40052000
+/* WDOG registers offsets */
+WDOG_STCTRLH	= 0
+WDOG_UNLOCK	= 0x0e
+
+WDOG_KEY1	= 0xc520
+WDOG_KEY2	= 0xd928
+
+	.thumb_func
+start:
+/* WDOG_UNLOCK = 0xC520 */
+	ldr     r3, =WDOG_ADDR
+	ldr     r2, =WDOG_KEY1
+	strh    r2, [r3, WDOG_UNLOCK]
+/* WDOG_UNLOCK = 0xD928 */
+	ldr     r2, =WDOG_KEY2
+	strh    r2, [r3, WDOG_UNLOCK]
+/* WDOG_STCTRLH clear bit 0 */
+	movs	r4, #1
+	ldrh    r2, [r3, WDOG_STCTRLH]
+	bics	r2, r4
+	strh    r2, [r3, WDOG_STCTRLH]
+/* OpenOCD checks exit point address. Jump to the very end. */
+	b	done
+
+	.pool
+
+/* Avoid padding at .text segment end. Otherwise exit point check fails. */
+	.skip	( . - start + 2) & 2, 0
+done:
+	bkpt    #0
+
+	.end
+