board: intel: Add socdk board support for Intel N5X device

Add N5X SoC devkit board.

Signed-off-by: Siew Chin Lim <elly.siew.chin.lim@intel.com>
diff --git a/board/intel/n5x-socdk/MAINTAINERS b/board/intel/n5x-socdk/MAINTAINERS
new file mode 100644
index 0000000..c1059f0
--- /dev/null
+++ b/board/intel/n5x-socdk/MAINTAINERS
@@ -0,0 +1,7 @@
+SOCFPGA BOARD
+M:	Chee Tien Fong <tien.fong.chee@intel.com>
+M:	Lim Siew Chin <elly.siew.chin.lim@intel.com>
+S:	Maintained
+F:	board/intel/n5x-socdk/
+F:	include/configs/socfpga_n5x_socdk.h
+F:	configs/socfpga_n5x_atf_defconfig