ARM: at91: lds: use "_image_binary_end" for DT location

The MMC SPL locates the BSS section to a different memory region
from text, then use "_image_binary_end" variable to point to the
correct device tree location.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
diff --git a/arch/arm/mach-at91/armv7/u-boot-spl.lds b/arch/arm/mach-at91/armv7/u-boot-spl.lds
index c667c55..d2e41a0 100644
--- a/arch/arm/mach-at91/armv7/u-boot-spl.lds
+++ b/arch/arm/mach-at91/armv7/u-boot-spl.lds
@@ -47,6 +47,8 @@
 		*(.__end)
 	} >.sram
 
+	_image_binary_end = .;
+
 	.bss :
 	{
 		. = ALIGN(4);