Build: Remove platform_bl2 in secure library link

lib platform_bl2 is for linking bl2 only. tfm_s links with lib
platform_s

Change-Id: I5f76db8bb74945dd6f463a3febaf45d04a3e84f8
Signed-off-by: Michel Jaouen <michel.jaouen@st.com>
Signed-off-by: Raef Coles <raef.coles@arm.com>
3 files changed