docs: embargoed-hardware-issues: add embargoed HW contact for Samsung

After discussions internally at the company, Javier has been volunteered
and is willing to be the embargoed hardware contact for Samsung.

Cc: Javier González <javier.gonz@samsung.com>
Signed-off-by: Luis Chamberlain <mcgrof.c@samsung.com>
Acked-by: Javier González <javier.gonz@samsung.com>
Link: https://lore.kernel.org/r/20230123215255.381312-1-mcgrof@kernel.org


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>