AMD Stoney Ridge: Add agesa_headers.h

- Create header files for the stoneyridge PI that pulls in AGESA pi
headers and encloses them in #pragma pack push/pop to keep the
'#pragma pack(1)' in Porting.h from leaking.
- Add that header to agesawrapper.h, replacing AGESA.h and Porting.h

Following patches will update the coreboot code to use only
agesawrapper.h to pull in the AGESA headers.

BUG=b:66818758
TEST=Build tested

Change-Id: Ib7d76811c1270ec7ef71266d84f3960919b792d4
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/21713
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2 files changed