ODROID-C5: add BL30 firmware for ODROID-C5

Signed-off-by: Dongjin Kim <tobetter@gmail.com>
Change-Id: I4ce4ef32dfbdd936b3420cd94645d9ce1f421a36
diff --git a/build_combination.in b/build_combination.in
index f690f72..ce515d4 100644
--- a/build_combination.in
+++ b/build_combination.in
@@ -34,6 +34,7 @@
 riscv s7d bm201_s905x5m aocpu
 riscv s7d bm202_s905x5m aocpu
 riscv s7d bm209_s905x5m aocpu
+riscv s7d s7d_odroidc5 aocpu
 riscv s7d t232_s905x5m aocpu
 riscv s6 s6_skt aocpu
 riscv s6 bl201_s905x5 aocpu