rockchip: theobroma: update URLs to point to CHERRY website

Most of the current URLs should be redirected but some aren't already,
so let's anticipate more IT hiccups by migrating to new URLs.

Signed-off-by: Quentin Schulz <quentin.schulz@cherry.de>
diff --git a/board/theobroma-systems/puma_rk3399/MAINTAINERS b/board/theobroma-systems/puma_rk3399/MAINTAINERS
index 2b409f1..2536e34 100644
--- a/board/theobroma-systems/puma_rk3399/MAINTAINERS
+++ b/board/theobroma-systems/puma_rk3399/MAINTAINERS
@@ -8,5 +8,5 @@
 F:	include/configs/puma_rk3399.h
 F:	arch/arm/dts/rk3399-puma*
 F:	configs/puma-rk3399_defconfig
-W:	https://www.theobroma-systems.com/rk3399-q7/tech-specs
-T:	git git://git.theobroma-systems.com/puma-u-boot.git
+W:	https://embedded.cherry.de/product/puma-som-rk3399-q7/
+T:	git git://git.embedded.cherry.de/puma-u-boot.git