uboot-imx: add support for TechNexion PICO-PI-IMX7D

Add mainline U-Boot flavour for TechNexion PICO-PI-IMX7D board, using
DM and upstream default configuration, storing payload in sector 138
of eMMC.

Signed-off-by: Lech Perczak <[email protected]>
[[email protected]: fixed BUILD_DEVICES value]
Signed-off-by: Piotr Dymacz <[email protected]>

package/boot/uboot-imx/Makefile

@@ -36,6 +36,14 @@ define U-Boot/mx6cuboxi
   BUILD_DEVICES:=solidrun_cubox-i
 endef
 
+define U-Boot/pico-pi-imx7d
+  NAME:=TechNexion PICO-PI-IMX7D
+  UBOOT_IMAGE:=SPL u-boot-dtb.img
+  UBOOT_MAKE_FLAGS:=SPL u-boot-dtb.img
+  BUILD_SUBTARGET:=cortexa7
+  BUILD_DEVICES:=technexion_imx7d-pico-pi
+endef
+
 define U-Boot/wandboard
   NAME:=Wandboard Dual Lite/Quad/Solo
   BUILD_SUBTARGET:=cortexa9
@@ -45,6 +53,7 @@ endef
 UBOOT_TARGETS := \
 	apalis_imx6 \
 	mx6cuboxi \
+	pico-pi-imx7d \
 	wandboard
 
 UBOOT_MAKE_FLAGS += u-boot.imx