[U-Boot] Move most CONFIG_HAVE_BLOCK_DEVICE to Kconfig

[Tom Rini]

On Tue, Feb 06, 2018 at 12:43:56PM -0600, Adam Ford wrote:

> config_fallbacks.h has some logic that sets HAVE_BLOCK_DEVICE
> based on a list of enabled options.  Moving HAVE_BLOCK_DEIVCE to
> Kconfig allows us to drastically shrink the logic in
> config_fallbacks.h
> 
> Signed-off-by: Adam Ford <aford173 at gmail.com>

Note that this needed a bit of work.  HAVE_BLOCK_DEVICE needed to be
turned into CONFIG_HAVE_BLOCK_DEVICE and then the patch made to ensure
we only select HAVE_BLOCK_DEVICE, not CONFIG_HAVE_BLOCK_DEVICE.  With
all of that, applied to u-boot/master, thanks!

-- 
Tom