[PATCH] Makefile: Fix calling make with V=1

[Tom Rini]

On Wed, Nov 04, 2020 at 10:34:35AM +0100, Pali Rohár wrote:

> Calling 'make V=1 all' on Ubuntu 18.04 with gcc version 9.2.1 and GNU Make
> version 4.1 fails on error:
> 
>     scripts/Kbuild.include:220: *** Recursive variable 'echo-cmd' references itself (eventually).  Stop.
> 
> As a workaround expand 'echo-cmd' variable via 'call' construction instead
> of expanding it directly.
> 
> Signed-off-by: Pali Rohár <pali at kernel.org>
> Reported-by: Patrick DELAUNAY <patrick.delaunay at st.com>

Applied to u-boot/master, thanks!

-- 
Tom
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