feat(rdn2cfg1): add tftf support

Add tftf support for Neoverse Reference Design RD-N2-Cfg1 platform.

Signed-off-by: Shriram K <shriram.k@arm.com>
Change-Id: I0d9287a50f8e1867e42bc0b0f29e94e9274f5eca
3 files changed