arm: novena: Fix kernel_addr_r env variable

The kernel_addr_r should be set to the same value as CONFIG_LOADADDR,
get rid of the duplication.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Sean Cross <xobs@kosagi.com>
Cc: Stefano Babic <sbabic@denx.de>

include/configs/novena.h

@@ -197,7 +197,7 @@
 	"bootdev=/dev/mmcblk0p1\0"					\
 	"rootdev=/dev/mmcblk0p2\0"					\
 	"netdev=eth0\0"							\
-	"kernel_addr_r=0x18000000\0"					\
+	"kernel_addr_r="__stringify(CONFIG_LOADADDR)"\0"		\
 	"addcons="							\
 		"setenv bootargs ${bootargs} "				\
 		"console=${consdev},${baudrate}\0"			\