rcar_gen3: plat: Function cleanup

Replace foo_t with struct foo.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
diff --git a/plat/renesas/rcar/bl2_plat_setup.c b/plat/renesas/rcar/bl2_plat_setup.c
index 77a5ed1..b0ce069 100644
--- a/plat/renesas/rcar/bl2_plat_setup.c
+++ b/plat/renesas/rcar/bl2_plat_setup.c
@@ -388,7 +388,7 @@
 	return 0;
 }
 
-meminfo_t *bl2_plat_sec_mem_layout(void)
+struct meminfo *bl2_plat_sec_mem_layout(void)
 {
 	return &bl2_tzram_layout;
 }