config/platforms.yaml: change dtb path for kontron boards

Since other arm-device the path is not set to the one used in the kernel
source dir. Seems it is handled like the legacy way when all dtbs are
located in one directory and not sorted via soc vendor.

Signed-off-by: Heiko Thiery <[email protected]>

Author: hthiery

config/platforms.yaml

@@ -199,13 +199,13 @@ platforms:
   kontron-kswitch-d10-mmt-6g-2gs:
     <<: *arm-device
     mach: microchip
-    dtb: dtbs/microchip/lan966x-kontron-kswitch-d10-mmt-6g-2gs.dtb
+    dtb: dtbs/lan966x-kontron-kswitch-d10-mmt-6g-2gs.dtb
     compatible: ['kontron,kswitch-d10-mmt-6g-2gs', 'kontron,s1921', 'microchip,lan9668', 'microchip,lan966']
 
   kontron-kswitch-d10-mmt-8g:
     <<: *arm-device
     mach: microchip
-    dtb: dtbs/microchip/lan966x-kontron-kswitch-d10-mmt-8g.dtb
+    dtb: dtbs/lan966x-kontron-kswitch-d10-mmt-8g.dtb
     compatible: ['kontron,kswitch-d10-mmt-8g', 'kontron,s1921', 'microchip,lan9668', 'microchip,lan966']
 
   kontron-sl28-var3-ads2: