svga/ci: set vmware piglit job parallelism to 2

Job parallelism controls the number of DUTs employed by the job.
As vmware CI farm enabled multiple DUTs recently, bump this to 2
DUTs for the time being.

Signed-off-by: Martin Krastev <martin.krastev@broadcom.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32526>

src/gallium/drivers/svga/ci/gitlab-ci.yml

@@ -25,13 +25,13 @@ vmware-vmx-piglit:x86_64:
     - .lava-piglit:x86_64
     - .vmware-rules
   timeout: 30m
+  parallel: 2
   variables:
     VISIBILITY_GROUP: "mesa-ci"
     GALLIUM_DRIVER: svga
     GPU_VERSION: svga
     PIGLIT_PLATFORM: mixed_glx_egl
     PIGLIT_PROFILES: gpu
-    PIGLIT_FRACTION: 2
     HWCI_START_WESTON: 1
     RUNNER_TAG: mesa-ci-x86-64-lava-vmware
     DEVICE_TYPE: x86