linux: update to linux-4.12.0

[MilhouseVH]

Work in progress....

1. nvidia-legacy doesn't currently build
2. media_build doesn't currently build
3. XBOX remote patch isn't compatible, needs reworking?
4. RTL8723BS added as module - ping @sorhtyre, RTL8723BS: add support for OBDA8723 - Bluetooth #1601

I've submitted fixes for RTL8812AU, RTL8192CU and RTL8192EU upstream, will bump and remove as those packages are updated.

4.12 announcement: https://lkml.org/lkml/2017/7/2/164

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Test build posts

Kernel	RPi/RPi2	Generic	Build
4.12-rc1	Link	Link	#0518x
4.12-rc2	Link	Link	#0522x
4.12-rc3	Link	Link	#0529x
4.12-rc4	Link	Link	#0605x
4.12-rc5	Link	Link	#0614x
4.12-rc6	Link	Link	#0619x
4.12-rc7	Link	Link	#0628x
4.12.0	Link	Link	#0704x
4.12.1	Link	Link	#0714

[MilhouseVH]

Updated XBOX remote script - thanks @HiassofT. Added latest RPi support commits.

[MilhouseVH]

Added commit to install all firmwares from linux-firmware/rtlwifi for all projects - adds extra 924Kb. This will mean the firmwares for rtl8723bs are installed.

[MilhouseVH]

On reflection I've reverted the rtlwifi firmware change as we already install rtlwifi from wlan-firmware. However the wlan-firmware package needs updating, ideally with the removal of files that are (or can be) provided by kernel-firmware. I'll see what I can do over the weekend.

Edit: Additional firmware is now installed via #1635

[MilhouseVH]

@sorhtyre & @piotrasd: is this service still required for RTL8723BS in this PR?

[HiassofT]

@MilhouseVH could you please add these 2 options on RPi and RPi2?

CONFIG_REGULATOR_ARIZONA_LDO1=m
CONFIG_REGULATOR_ARIZONA_MICSUPP=m

The old CONFIG_REGULATOR_ARIZONA was split up into 2 separate options. See also here:
raspberrypi/linux#2101

[MilhouseVH]

Thanks @HiassofT - RPi/RPi2 configs updated.

[MilhouseVH]

Rebased. Build tested on RPi/RPi2/Generic OK.

@sorhtyre & @piotrasd: if additional work is required for RTL8723BS you'll need to sort it out yourself.

4,12.1 is already available so I'll push a PR for that (merge about 4.12.4, I guess).

[HiassofT]

Please add this patch to media_build 8a24ffd - it fixes non-working lircd.

Also since lirc_rpi will be broken by the media_build bump (and probably won't get fixed) it's better to remove it from the kernel configs.

I'm not sure if lirc_xbox still works, but since that would be the only lirc driver remaining I think it's best to remove the downstream patch and disable CONFIG_LIRC_STAGING (which should remove both LIRC_RPI and LIRC_XBOX).

[MilhouseVH]

media_build patches updated.

Dropped LIRC_RPI and LIRC_STAGING from RPi/RPi2/Generic due to media_build conflicts. Not sure about other projects - will add if needed.

Looks like LIRC_XBOX is now dead, so perhaps we can drop https://github.com/LibreELEC/LibreELEC.tv/blob/master/packages/linux/patches/default/linux-052-XBOX_remote_support.patch ?

[MilhouseVH]

Can we merge this, I'm on 4.12.1 already... if we need more changes they can come later.

[MilhouseVH]

And 4.12.2 is now available...