imx: add imx8x capricorn giedi board

Add support for i.MX8X based Capricorn Giedi SoM.

Supported interfaces: GPIO, ENET, eMMC, I2C, UART.

Console output:

  U-Boot SPL 2020.01-00003-gfd1c98f (Jan 07 2020 - 15:51:25 +0100)
  Trying to boot from MMC1
  Load image from MMC/SD 0x3e400

  U-Boot 2020.01-00003-gfd1c98f (Jan 07 2020 - 15:51:25 +0100) ##v01.07

  CPU:   NXP i.MX8QXP RevB A35 at 1200 MHz at 30C

  Model: Siemens Giedi
  Board: Capricorn
  Boot:  MMC0
  DRAM:  1022 MiB
  MMC:   FSL_SDHC: 0
  Loading Environment from MMC... OK
  In:    serial@5a080000
  Out:   serial@5a080000
  Err:   serial@5a080000
  Net:   eth1: ethernet@5b050000 [PRIME]
  Autobooting in 1 seconds, press "<Esc><Esc>" to stop

Signed-off-by: Anatolij Gustschin <agust@denx.de>
diff --git a/arch/arm/mach-imx/imx8/Kconfig b/arch/arm/mach-imx/imx8/Kconfig
index cdb78af..bb45c8e 100644
--- a/arch/arm/mach-imx/imx8/Kconfig
+++ b/arch/arm/mach-imx/imx8/Kconfig
@@ -55,6 +55,11 @@
 	select BOARD_LATE_INIT
 	select IMX8QXP
 
+config TARGET_GIEDI
+	bool "Support i.MX8QXP Capricorn Giedi board"
+	select BOARD_LATE_INIT
+	select IMX8QXP
+
 config TARGET_IMX8QM_MEK
 	bool "Support i.MX8QM MEK board"
 	select BOARD_LATE_INIT
@@ -78,5 +83,6 @@
 source "board/advantech/imx8qm_rom7720_a1/Kconfig"
 source "board/toradex/apalis-imx8/Kconfig"
 source "board/toradex/colibri-imx8x/Kconfig"
+source "board/siemens/capricorn/Kconfig"
 
 endif