ARM: SoC cleanups for v4.1

We've got a fairly large cleanup branch this time. The bulk of this is removal
of non-DT platforms of several flavors:

- Atmel at91 platforms go full-DT, with removal of remaining board-file based
  support
- OMAP removes legacy board files for three more platforms
- Removal of non-DT mach-msm, newer Qualcomm platforms now live in mach-qcom
- Freescale i.MX25 also removes non-DT platform support

Most of the rest of the changes here are fallout from the above, i.e. for
example removal of drivers that now lack platforms, etc.
Merge tag 'imx-cleanup-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into next/cleanup

Merge "ARM: imx: cleanup for 4.1" from Shawn Guo:

The i.MX cleanup for v4.1:
 - Convert i.MX25 to be a DT only platform and remove the code that is
   only used by non-DT support
 - A couple trivial cleanup on iomux-v3 code

* tag 'imx-cleanup-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux:
  ARM: imx_v4_v5_defconfig: Remove CONFIG_MACH_MX25_3DS
  ARM: mx25: Remove imxdi_rtc platform code
  ARM: mx25: Remove "mx25.h" header file
  ARM: mx25: Remove static memory mapping
  ARM: mx25: Retrieve IIM base from dt
  ARM: mx25: Remove mx25_clocks_init()
  ARM: mx25: Remove platform code support files
  ARM: mx25: Convert to a dt-only platform
  ARM: imx25: Remove eukrea mx25 board files
  ARM: mx25: Remove mach-mx25_3ds board file
  ARM: imx: Fix trivial typo in comments
  ARM: imx: Kconfig: Fix grammar in help text
  ARM: imx/iomux-v3: allow pad_list to be const

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