ARM: rmobile: Switch back to fdtdec_setup_memory/banksize_fdt()

The commit 361377db ("ARM: rmobile: Merge prior-stage firmware DT
fragment into U-Boot DT on Gen3") reverted changes introduced by commit
175f5027 ("ARM: renesas: Configure DRAM size from ATF DT fragment")
that's why there is no reason to use functions with _fdt() suffix because
parameter is gd->fdt_blob as is already for functions without _fdt()
suffix.
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>

board/renesas/rcar-common/common.c

@@ -33,12 +33,12 @@ int fdtdec_board_setup(const void *fdt_blob)
 
 int dram_init(void)
 {
-	return fdtdec_setup_mem_size_base_fdt(gd->fdt_blob);
+	return fdtdec_setup_mem_size_base();
 }
 
 int dram_init_banksize(void)
 {
-	fdtdec_setup_memory_banksize_fdt(gd->fdt_blob);
+	fdtdec_setup_memory_banksize();
 
 	return 0;
 }