uboot: grow rootfs for non minimal images

When building target and development images, recipe lacks space
to install target and development rootfs.

Signed-off-by: Héctor Orón Martínez <hector.oron@collabora.co.uk>
Differential Revision: https://phabricator.apertis.org/D7296

apertis-image-uboot.yaml

@@ -44,6 +44,8 @@ actions:
         start: 256M
 {{ if eq $type "minimal" }}
         end: 1024M
+{{ else }}
+        end: 8192M
 {{end}}
       - name: general_storage
         fs: btrfs