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/MAINTAINERS b/board/purism/librem5/MAINTAINERS
new file mode 100644
index 0000000..09e7f20
--- /dev/null
+++ b/board/purism/librem5/MAINTAINERS
@@ -0,0 +1,8 @@
+PURISM LIBREM5 PHONE
+M:	Angus Ainslie <angus@akkea.ca>
+R:	kernel@puri.sm
+S:	Supported
+F:	arch/arm/dts/imx8mq-librem5*
+F:	board/purism/librem5/
+F:	configs/librem5_defconfig
+F:	include/configs/librem5.h