[S] Change in coreboot[master]: libpayload: Fix compiler warnings

[Thomas Heijligen (Code Review)]

Attention is currently required from: Nico Huber, Thomas Heijligen.

Hello Felix Singer, build bot (Jenkins), Nico Huber, Eric Lai,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/69764

to look at the new patch set (#3).

Change subject: libpayload: Fix compiler warnings
......................................................................

libpayload: Fix compiler warnings

Following warnings occur when compiling with
`i386-elf-gcc (coreboot toolchain v2022-09-18_c8870b1334) 11.2.0`

drivers/serial/8250.c:75: [-Werror=unused-variable]
  Move variable declaration inside the
  `#if !CONFIG(LP_PL011_SERIAL_CONSOLE)` block

drivers/udc/dwc2.c:505: [-Werror=format=]
  use `%zd` to match type `size_t`

Change-Id: Id285c24cba790f181fa203f3117e5df35bed27c4
Signed-off-by: Thomas Heijligen 
---
M payloads/libpayload/drivers/serial/8250.c
M payloads/libpayload/drivers/udc/dwc2.c
2 files changed, 22 insertions(+), 2 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/64/69764/3