[U-Boot] [U-Boot,1/2] rtc: rv3029: add to Kconfig

[Philipp Tomsich]

> The MicroCrystal RV3029 driver didn't have a Kconfig entry and was not used
> anywhere. Add it to Kconfig to make it selectable.
> 
> Signed-off-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
> Tested-by: Klaus Goger <klaus.goger at theobroma-systems.com>
> ---
> 
>  drivers/rtc/Kconfig | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 

Applied to u-boot-rockchip, thanks!