mfd: da9062: Supply core driver

Add MFD core driver support for DA9062

Signed-off-by: Steve Twiss <stwiss.opensource@diasemi.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

diff --cc drivers/mfd/Kconfig
Simple merge

diff --cc drivers/mfd/Makefile
Simple merge

diff --cc drivers/mfd/da9062-core.c
Simple merge

diff --cc include/linux/mfd/da9062/core.h
Simple merge

diff --cc include/linux/mfd/da9062/registers.h
Simple merge