roms/Makefile.edk2: prepare for replacing TPM2*_ENABLE macros

roms/Makefile.edk2: prepare for replacing TPM2*_ENABLE macros

Ekd2 commit 07952a962a40 ("OvmfPkg: rename TPM2 config prefix to TPM",
2020-03-04), part of edk2-stable202005, renamed OVMF's TPM2*_ENABLE build
flags to TPM*_ENABLE. Going forward, the TPM*_ENABLE flags would activate
both TPM1.2 and TPM2.0 support.

In order to build OVMF at edk2-stable202008 without losing currently
enabled functionality, insert the new flags as no-ops now. We'll remove
the old flags after advancing with the edk2 submodule.

Cc: Philippe Mathieu-Daudé <philmd@redhat.com>
Ref: https://bugs.launchpad.net/qemu/+bug/1852196
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200908072939.30178-4-lersek@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>