arm: imx: Add support for Google's Coral Dev Board

Add initial support for Google's Coral Dev Board based on i.MX8MQ.

https://coral.ai/products/dev-board

The Phanbell naming has been used here to match the naming convention
used in Google's U-Boot source tree:

https://coral.googlesource.com/uboot-imx/

Co-developed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Alifer Moraes <alifer.wsdm@gmail.com>
Tested-by: Marco Franchi <marcofrk@gmail.com>
diff --git a/arch/arm/mach-imx/imx8m/Kconfig b/arch/arm/mach-imx/imx8m/Kconfig
index 58f1758..895f903 100644
--- a/arch/arm/mach-imx/imx8m/Kconfig
+++ b/arch/arm/mach-imx/imx8m/Kconfig
@@ -32,6 +32,11 @@
 	select IMX8MQ
 	select IMX8M_LPDDR4
 
+config TARGET_IMX8MQ_PHANBELL
+        bool "imx8mq_phanbell"
+        select IMX8MQ
+        select IMX8M_LPDDR4
+
 config TARGET_IMX8MM_EVK
 	bool "imx8mm LPDDR4 EVK board"
 	select IMX8MM
@@ -62,6 +67,7 @@
 source "board/freescale/imx8mm_evk/Kconfig"
 source "board/freescale/imx8mn_evk/Kconfig"
 source "board/freescale/imx8mp_evk/Kconfig"
+source "board/google/imx8mq_phanbell/Kconfig"
 source "board/toradex/verdin-imx8mm/Kconfig"
 
 endif