[U-Boot] Convert CONFIG LIB_HW_RAND to Kconfig

[Tom Rini]

On Tue, Feb 06, 2018 at 10:18:18AM -0600, Adam Ford wrote:

> config_fallbacks.h had some logic to automatically select
> LIB_RAND if RANDOM_UUID or CMD_UUID were set if LIB_HW_RAND wasn't
> already selected.  By migrating LIB_HW_RAND to Kconfig, we can
> remove this check from config_fallbacks.h and put it into Kconfig
> 
> Signed-off-by: Adam Ford <aford173 at gmail.com>
> Reviewed-by: Lukasz Majewski <lukma at denx.de>

Applied to u-boot/master, thanks!

-- 
Tom