ARM: uniphier: fix doubled tftpboot commands

This downloads the same file twice for nothing.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

include/configs/uniphier.h

@@ -225,7 +225,6 @@
 		"tftpboot $fdt_addr_r $fdt_file &&" \
 		"run boot_common\0" \
 	"__nfsboot=tftpboot $kernel_addr_r $bootfile &&" \
-		"tftpboot $fdt_addr_r $fdt_file &&" \
 		"tftpboot $fdt_addr_r $fdt_file &&" \
 		"setenv ramdisk_addr_r - &&" \
 		"run boot_common\0"