uboot-imx

tpm: Convert drivers to use SPDX

Add an SPDX header to two drivers that don't have it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Christophe Ricard <christophe-h.ricard@st.com>
Reviewed-by: Heiko Schocher <hs@denx.de>