soc/amd/phoenix/espi_util: remove TODO after checking

Checked against both documents #57019 revision 1.59 and #57396 revision
1.50 that the definitions and the code still apply to Phoenix.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: Id65301ec730793f41044696f2e99356f2e899137
Reviewed-on: https://review.coreboot.org/c/coreboot/+/72120
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Fred Reitberger <reitbergerfred@gmail.com>
Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>

src/soc/amd/phoenix/espi_util.c

@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
-/* TODO: Update for Phoenix */
-
 #include <amdblocks/spi.h>
 #include <soc/espi.h>
 #include <types.h>