fix(st): rework secure-status check in fdt_get_status()

This corrects MISRA C2012-15.7:
All if...else if constructs shall be terminated with an else statement.

Signed-off-by: Yann Gautier <yann.gautier@st.com>
Change-Id: I3d893d0db0a448323270086923563147008c59b9
1 file changed