arm: imx53: Add support for imx53 boards from K+P

This commit adds support for DDC and HSC boards from
K+P in u-boot.

Console output:

U-Boot 2018.05-rc2-00090-g752b7ed6f9 (Apr 26 2018 - 14:24:24 +0200)

CPU:   Freescale i.MX53 rev2.1 at 800 MHz
Reset cause: WDOG
Model: K+P iMX53
DRAM:  512 MiB
MMC:   FSL_SDHC: 0
Loading Environment from MMC... OK
In:    serial
Out:   serial
Err:   serial
Module EEPROM:
  ID: TQMa53-CB.0401
  SN: 63152762
  MAC: 00:0b:64:03:14:2a
BBoard:40x0 Rev:10
Net:   eth0: ethernet@63fec000
Hit any key to stop autoboot:  0

Signed-off-by: Lukasz Majewski <lukma@denx.de>
diff --git a/arch/arm/mach-imx/mx5/Kconfig b/arch/arm/mach-imx/mx5/Kconfig
index 3ce6bcf..06322b2 100644
--- a/arch/arm/mach-imx/mx5/Kconfig
+++ b/arch/arm/mach-imx/mx5/Kconfig
@@ -16,6 +16,17 @@
 	prompt "MX5 board select"
 	optional
 
+config TARGET_KP_IMX53
+	bool "Support K+P imx53 board"
+	select BOARD_LATE_INIT
+	select MX53
+	select DM
+	select DM_SERIAL
+	select DM_ETH
+	select DM_I2C
+	select DM_GPIO
+	select DM_PMIC
+
 config TARGET_M53EVK
 	bool "Support m53evk"
 	select MX53
@@ -79,6 +90,7 @@
 source "board/freescale/mx53smd/Kconfig"
 source "board/ge/mx53ppd/Kconfig"
 source "board/inversepath/usbarmory/Kconfig"
+source "board/k+p/kp_imx53/Kconfig"
 source "board/technologic/ts4800/Kconfig"
 
 endif