rpi: Adjust fdt_addr_r to a sane address

Back in the old days, 0x100 was used as the address to pass the device tree
from firmware into the kernel. This has since changed to a more dynamic
location, so using 0x100 actually breaks more things than it helps with.

Let's move the device tree default location for distro boot to a more sane
place that gives us enough head room in low memory.

Reported-by: Tuomas Tynkkynen <tuomas@tuxera.com>
Signed-off-by: Alexander Graf <agraf@suse.de>

include/configs/rpi.h

@@ -123,7 +123,7 @@
 #define ENV_MEM_LAYOUT_SETTINGS \
 	"fdt_high=ffffffff\0" \
 	"initrd_high=ffffffff\0" \
-	"fdt_addr_r=0x00000100\0" \
+	"fdt_addr_r=0x01f00000\0" \
 	"pxefile_addr_r=0x00100000\0" \
 	"kernel_addr_r=0x01000000\0" \
 	"scriptaddr=0x02000000\0" \