ARM: hikey: Adjust SDRAM_1_SIZE to 0x3EFFFFFF

DRAM region 0x3f000000 - 0x3fffffff is reserved for OP-TEE. Touching
0x3f000000 memory location from unsecure world causes the board
to hang.

Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>

include/configs/hikey.h

@@ -42,7 +42,8 @@
 #define PHYS_SDRAM_1			0x00000000
 
 /* 1008 MB (the last 16Mb are secured for TrustZone by ATF*/
-#define PHYS_SDRAM_1_SIZE		0x3f000000
+#define PHYS_SDRAM_1_SIZE		0x3EFFFFFF
+
 #define CONFIG_SYS_SDRAM_BASE		PHYS_SDRAM_1
 
 #define CONFIG_SYS_INIT_RAM_SIZE	0x1000