arm: imx: add i.MX53 Beckhoff CX9020 Embedded PC

Add CX9020 board based on mx53loco.
Add simplified imx53 base device tree from kernel v4.8-rc8, to reuse
serial_mxc with DTE and prepare for device tree migration of other
functions and imx53 devices.

The CX9020 differs from i.MX53 Quick Start Board by:
- use uart2 instead of uart1
- DVI-D connector instead of VGA
- no audio
- CCAT FPGA connected to emi
- enable rtc

Signed-off-by: Patrick Bruenn <p.bruenn@beckhoff.com>
diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig
index f3f6bf7..a760944 100644
--- a/drivers/fpga/Kconfig
+++ b/drivers/fpga/Kconfig
@@ -3,6 +3,26 @@
 config FPGA
 	bool
 
+config FPGA_ALTERA
+	bool "Enable Altera FPGA drivers"
+	select FPGA
+	help
+	  Say Y here to enable the Altera FPGA driver
+
+	  This provides basic infrastructure to support Altera FPGA devices.
+	  Enable Altera FPGA specific functions which includes bitstream
+	  (in BIT format), fpga and device validation.
+
+config FPGA_CYCLON2
+	bool "Enable Altera FPGA driver for Cyclone II"
+	depends on FPGA_ALTERA
+	help
+	  Say Y here to enable the Altera Cyclone II FPGA specific driver
+
+	  This provides common functionality for Altera Cyclone II devices.
+	  Enable FPGA driver for loading bitstream in BIT and BIN format
+	  on Altera Cyclone II device.
+
 config FPGA_XILINX
 	bool "Enable Xilinx FPGA drivers"
 	select FPGA