omap3_logic: Fix FDT ADDR for ramdisk booting

The boot scripts for booting from ramdisk are using
${fdtimage} when they really should be using ${fdtaddr}

This patch will fix it so the RAMdisk bootscripts operate
correctly.

Signed-off-by: Adam Ford <aford173@gmail.com>

include/configs/omap3_logic.h

@@ -153,10 +153,10 @@
 		"run loadramdisk\0" \
 	"mmcramboot=setenv bootfile uImage; " \
 		"run mmcrambootcommon; " \
-		"bootm ${loadaddr} ${rdaddr} ${fdtimage}\0" \
+		"bootm ${loadaddr} ${rdaddr} ${fdtaddr}\0" \
 	"mmcrambootz=setenv bootfile zImage; " \
 		"run mmcrambootcommon; " \
-		"bootz ${loadaddr} ${rdaddr} ${fdtimage}\0" \
+		"bootz ${loadaddr} ${rdaddr} ${fdtaddr}\0" \
 	"tftpboot=echo 'Booting kernel/ramdisk rootfs from tftp...'; " \
 		"run ramargs; " \
 		"run common_bootargs; " \