scripts/sequence-patch.sh: Use vanilla config file for --vanilla

If the --vanilla option is used, copy the vanilla config file to the
generated source tree, instead of the default config file.
- Update Xen patches to 3.12.15.
- Refresh Xen patches (bnc#868968, bnc#870874).
- Update x86_64 config files: disable CONFIG_SBC8360_WDT

The sbc8360 driver is for a Socket 370-based single-board computer,
I'm not sure any customer would run SLES12 on that kind of hardware,
and I'm fairly certain that none would do so on such an old piece of
32-bit x86 hardware.
supported.conf: mark w83977f_wdt as supported

Watchdog component in a generic Super-I/O chip.
fujitsu-laptop: Drop unneeded include.

This fixes the newly introduced warnings:

In file included from ##C##/drivers/platform/x86/fujitsu-laptop.c:##L##:
include/linux/video_output.h: warning: 'video_output_register' defined but not used [-Wunused-function]
 static struct output_device *video_output_register(const char *name,
                              ^
include/linux/video_output.h: warning: 'video_output_unregister' defined but not used [-Wunused-function]
 static void video_output_unregister(struct output_device *dev)
             ^
Update upstream status

The following patches are upstream now:
patches.fixes/video-output-01-acpi-drop-dependency.patch
patches.fixes/video-output-02-gpu-drm-drop-selects.patch
patches.fixes/video-output-03-acer_wmi-drop-select.patch
mfd: lpc_ich: Convert ICH GPIOs IDs to enum (bnc#871908).
mfd: lpc_ich: Add support for Intel Avoton GPIOs (bnc#871908).
mfd: lpc_ich: Fix ACPI enable bitmask (bnc#871908).
mfd: lpc_ich: Only configure watchdog or GPIO when present
(bnc#871908).
mfd: lpc_ich: Remove lpc_ich_cfg struct use (bnc#871908).
mfd: lpc_ich: Add support for iTCO v3 (bnc#871908).
watchdog: iTCO_wdt: Add support for v3 silicon (bnc#871908).
mfd: lpc_ich: Change Avoton to iTCO v3 (bnc#871908).
mfd: lpc_ich: Add support for NM10 GPIO (bnc#871908).
mfd: lpc_ich: Add support for Intel Bay Trail SoC (bnc#871908).
megaraid_sas: Fallback to older scanning if not disks are found
(bnc#870440).
megaraid_sas: Evaluate return status from megasas_issue_polled()
(bnc#872028).
rpm/kernel-module-subpackage: Regenerated the initrd in %posttrans
(fate#313506)
Merge branch 'packaging' into SLE12