arm: tegra: define fdtfile option for distro boot

For booting via UEFI we need to define the fdtfile option so
bootefi has the option to load a fdtfile from disk. For arm64
the kernel dtb is located in a vendor directory so we define
that as nvidia for that architecture.

Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
diff --git a/include/configs/tegra30-common.h b/include/configs/tegra30-common.h
index 54bc675..6c5dc24 100644
--- a/include/configs/tegra30-common.h
+++ b/include/configs/tegra30-common.h
@@ -47,6 +47,7 @@
 	"scriptaddr=0x90000000\0" \
 	"pxefile_addr_r=0x90100000\0" \
 	"kernel_addr_r=" __stringify(CONFIG_LOADADDR) "\0" \
+	"fdtfile=" FDTFILE "\0" \
 	"fdt_addr_r=0x83000000\0" \
 	"ramdisk_addr_r=0x83100000\0"