This reworks the generic support for versatile express, in part
as preparation for the arm64 version of it that can now share
more of the code.
From Pawel Moll <pawel.moll@arm.com>:
* 'vexpress-soc' of git://git.linaro.org/people/pawelmoll/linux:
ARM: vexpress: Remove motherboard dependencies in the DTS files
ARM: vexpress: Start using new Versatile Express infrastructure
ARM: vexpress: Add config bus components and clocks to DTs
mfd: Versatile Express system registers driver
mfd: Versatile Express config infrastructure
Signed-off-by: Arnd Bergmann <arnd@arndb.de>