[PATCH] common: blk: fix comment about blkcache_read return value

[Tom Rini]

On Wed, Jan 22, 2020 at 04:59:55PM -0700, Eric Nelson wrote:

> The blkcache_read() routine returns 1 (true) to indicate that a block was
> found in the cache and returned, or 0 if not.
> 
> Signed-off-by: Eric Nelson <eric at nelint.com>

Applied to u-boot/master, thanks!

-- 
Tom
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