[PATCH] Use `grep -E` or plain `grep` instead of `egrep`

[Tom Rini]

On Sun, Jan 01, 2023 at 06:41:42PM +0200, Ville Skyttä wrote:

> `egrep` has been deprecated in GNU grep since 2007,
> and since 3.8 it emits obsolescence warnings:
> https://git.savannah.gnu.org/cgit/grep.git/commit/?id=a9515624709865d480e3142fd959bccd1c9372d1
> Acked-by: Dhruva Gole <d-gole at ti.com>

Applied to u-boot/master, thanks!

-- 
Tom
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