nb/intel/gm45: Clean up header handling

There's no need to have ACPI guards in `gm45.h`, since the only things
the ASL files require are the base address definitions in `memmap.h`.
Also, remove the southbridge include from `gm45.h` and place it only in
the files that actually require something from it.

Tested with BUILD_TIMELESS=1, Roda RK9 remains identical.

Change-Id: Ica2c5ae9f57595c8577a1bfcc3b57f2c57b3e980
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45452
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

0 files changed, 0 insertions, 0 deletions