board: purism: add the Purism Librem5 phone

Initial commit of Librem5 u-boot and SPL

Signed-off-by: Angus Ainslie <angus@akkea.ca>
Co-developed-by: Sebastian Krzyszkowiak <sebastian.krzyszkowiak@puri.sm>
Signed-off-by: Sebastian Krzyszkowiak <sebastian.krzyszkowiak@puri.sm>
Reviewed-by: Fabio Estevam <festevam@denx.de>
diff --git a/board/purism/librem5/imximage-8mq-lpddr4.cfg b/board/purism/librem5/imximage-8mq-lpddr4.cfg
new file mode 100644
index 0000000..3b59671
--- /dev/null
+++ b/board/purism/librem5/imximage-8mq-lpddr4.cfg
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright 2021 NXP
+ */
+
+FIT
+BOOT_FROM	sd
+SIGNED_HDMI     signed_hdmi.bin
+LOADER		u-boot-spl-ddr.bin	0x7E1000