The armadillo800eva has S35390A which is RTC. This is controlled
using I2C of GPIO.
This commit supports RTC of armadillo800eva.
Signed-off-by: NNobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: NSimon Horman <horms@verge.net.au>