chip/mt8192_scp: fix unknown type errors
chip/mt8192_scp: fix unknown type errors

Fixes unknown type errors such as:
chip/mt8192_scp/ipi_chip.h:40:2: error: unknown type name 'uint32_t'
  uint32_t signaled;

BRANCH=none
BUG=b:191835814
TEST=make BOARD=asurada_scp

Signed-off-by: Tzung-Bi Shih <5e6f7578cd434ae5b4c9ffe5250f7a87a25045d7@chromium.org>
Change-Id: If6f0f94540e099e547d7015e82bb4dacb88ebd3b
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2985059
Reviewed-by: Eric Yilun Lin <2f2733c7206ea2b76bd2db1905cc5e8a75841c48@google.com>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec