ARM: rmobile: Point load address to more sane area on Gen3

Point the $loadaddr variable and default load address to a more sane
area, 384 MiB from the start of RAM. This is to avoid all the reserved
memory at the beginning of RAM. The old behavior could still be easily
retained by "setenv loadaddr 0x48080000" . The new setup allows us to
use for example modern fitImage with kernel_noload, so use this as a
new preferred default.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

include/configs/rcar-gen3-common.h

@@ -42,7 +42,8 @@
 #define CONFIG_NR_DRAM_BANKS		4
 #define CONFIG_SYS_SDRAM_BASE		(0x40000000 + DRAM_RSV_SIZE)
 #define CONFIG_SYS_SDRAM_SIZE		(0x80000000u - DRAM_RSV_SIZE)
-#define CONFIG_SYS_LOAD_ADDR		0x48080000
+#define CONFIG_SYS_LOAD_ADDR		0x58000000
+#define CONFIG_LOADADDR			CONFIG_SYS_LOAD_ADDR
 #define CONFIG_VERY_BIG_RAM
 #define CONFIG_MAX_MEM_MAPPED		(0x80000000u - DRAM_RSV_SIZE)