Revert "gpu: ion: Modify ION_NUM_HEAPS to reflect actual max"

This reverts commit bd2c0afc09d21de24236ecf8c007c916ca871e55.
Revert "sunsu: Fix panic in case of nonexistent port at "console=ttySY" cmdline option"

This reverts commit 05936fde00c618b49f24bab23079bf5a447554ef.