board: lg: x3: add Optimus 4X HD and Optimus Vu support

LG X3 is a development board based on Nvidia Tegra 3 SoC
on base of which Optimus 4X HD and Optimus Vu were created.
Both smartphones feature a 4.7" and 5" panels respectively,
an Nvidia Tegra 3 quad-core chip, 1 GB of RAM and 16/32 GB
of internal storage. Optimux 4X HD additionally has a micro
SD slot.

Tested-by: Andreas Westman Dorcsak <hedmoo@yahoo.com> # LG P880 T30
Tested-by: Svyatoslav Ryhel <clamor95@gmail.com> # LG P895 T30
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
diff --git a/board/lg/x3-t30/Makefile b/board/lg/x3-t30/Makefile
new file mode 100644
index 0000000..3eeb132
--- /dev/null
+++ b/board/lg/x3-t30/Makefile
@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+#  (C) Copyright 2010-2012
+#  NVIDIA Corporation <www.nvidia.com>
+#
+#  (C) Copyright 2021
+#  Svyatoslav Ryhel <clamor95@gmail.com>
+
+obj-$(CONFIG_SPL_BUILD) += x3-t30-spl.o
+
+obj-y += x3-t30.o