Merge tag 'stm32-dt-for-v4.11-1-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/atorgue/stm32 into next/dt

STM32 DT updates for v4.11, round 1 Version 2.

Highlights:
----------

 - ADD RTC support on STM32F429 MCU
 - Enable RTC on STM32F469and STM32F429 boards
 - ADD ADC support on STM32F429 MCU
 - Enable ADC on STM32F429 Eval board
 - Add I2S external clock
 - Fix memory size for STM32F429 Disco

* tag 'stm32-dt-for-v4.11-1-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/atorgue/stm32

:
  ARM: dts: stm32: enable RTC on stm32429i-eval
  ARM: dts: stm32: enable RTC on stm32f469-disco
  ARM: dts: stm32: enable RTC on stm32f429-disco
  ARM: dts: stm32: Add RTC support for STM32F429 MCU
  ARM: dts: stm32: set HSE_RTC clock frequency to 1 MHz on stm32f429
  ARM: dts: stm32: Include auxiliary stm32fx clock definition
  ARM: dts: stm32: Add external I2S clock on stm32f429 MCU
  ARM: dts: stm32: enable ADC on stm32f429i-eval board
  ARM: dts: stm32: Add ADC support to stm32f429
  ARM: dts: stm32: Add missing USART3 pin config to stm32f469-disco board
  ARM: dts: stm32: Fix memory size from 8MB to 16MB on stm32f469-disco board
  clk: stm32f4: Update DT bindings documentation

Signed-off-by: Olof Johansson <olof@lixom.net>