soc/amd/common: Clean up GetHeapBase function

Make GetHeapBase a static function.  Change the type of return value to
a void pointer and remove the unused StdHeader argument.  This should be
innocuous and will allow a subsequent patch to be simpler.

Change-Id: Id4a024d000a514ea9a44f9dfc2caffae9ff01789
Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-on: https://review.coreboot.org/21593
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
2 files changed