imx.mk: add imx8mp-evk and imx8mp-verdin board support

imx.mk is now generic to support other i.MX boards.
Add board specific config snippet as examples to support imx8mp-evk and
imx8mp-verdin platforms.
Keep imx.mk default behavior to support imx8mq-evk platform.

Signed-off-by: Fathi Boudra <fathi.boudra@linaro.org>
Acked-by: Jerome Forissier <jerome.forissier@linaro.org>
Acked-by: Jens Wiklander <jens.wiklander@linaro.org>
diff --git a/imx8mp-evk.inc.mk b/imx8mp-evk.inc.mk
new file mode 100644
index 0000000..32d6c56
--- /dev/null
+++ b/imx8mp-evk.inc.mk
@@ -0,0 +1,15 @@
+################################################################################
+# Board specific
+################################################################################
+TFA_PLATFORM      := imx8mp
+OPTEE_OS_PLATFORM := imx-mx8mpevk
+U_BOOT_DEFCONFIG  := imx8mp_evk_defconfig
+U_BOOT_DT         := imx8mp-evk.dtb
+LINUX_DT          := imx8mp-evk.dtb
+MKIMAGE_DT        := fsl-imx8mp-evk.dtb
+MKIMAGE_SOC       := iMX8MP
+
+BR2_TARGET_GENERIC_GETTY_PORT := ttymxc2
+
+FIRMWARE_VERSION	:= firmware-imx-8.10.1
+FIRMWARE_BIN_SHA256_SUM := da415c32063c08fce8f52734f198b19ab06bd7d4333a4df900f8831df562f8fc