CI: Re-enable Panfrost T7x0 jobs

The hardware issue in the lab preventing jobs from being run on those
machines (and limiting T820 availability), leading to them being
disabled in !4965, has been fixed.

Signed-off-by: Daniel Stone <daniels@collabora.com>
Fixes: 696bafac40 ("CI: Disable Panfrost T7x0 jobs")
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5006>

.gitlab-ci/lava-gitlab-ci.yml

@@ -76,7 +76,7 @@
     - arm_build
     - meson-arm64
 
-.panfrost-t720-gles2:arm64:
+panfrost-t720-gles2:arm64:
   extends:
     - .lava-test:arm64
     - .panfrost-rules
@@ -89,7 +89,7 @@
   tags:
     - mesa-ci-aarch64-lava-collabora
 
-.panfrost-t760-gles2:armhf:
+panfrost-t760-gles2:armhf:
   extends:
     - .lava-test:armhf
     - .panfrost-rules