[U-Boot] bootm: Simplying cache flush code

[Tom Rini]

On Wed, Mar 27, 2019 at 11:50:09PM +0000, Trent Piepho wrote:

> The cache flush of the kernel load area needs to be aligned outward to
> the DMA cache alignment.  The operations are simpler if we think of this
> as aligning the start down, ALIGN_DOWN(load, ARCH_DMA_MINALIGN), and
> aligning the end up, ALIGN(load_end, ARCH_DMA_MINALIGN), and then find
> the length of the flushed region by subtracting the former from the
> latter.
> 
> Cc: Tom Rini <trini at konsulko.com>
> Cc: Simon Glass <sjg at chromium.org>
> Cc: Bryan O'Donoghue <bryan.odonoghue at linaro.org>
> Signed-off-by: Trent Piepho <tpiepho at impinj.com>
> Reviewed-by: Simon Glass <sjg at chromium.org>

Applied to u-boot/master, thanks!

-- 
Tom
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