ci/freedreno: Mark the rest of the glx_arb_sync_control@timing as flakes.

IIRC I've seen -msc-delta 2 flake set, so just complete the set.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9660>

src/gallium/drivers/freedreno/ci/piglit-freedreno-a630-flakes.txt

@@ -1,5 +1,7 @@
 glx@glx_arb_sync_control@timing -divisor 1
+glx@glx_arb_sync_control@timing -divisor 2
 glx@glx_arb_sync_control@timing -msc-delta 1
+glx@glx_arb_sync_control@timing -msc-delta 2
 glx@glx_arb_sync_control@timing -fullscreen -divisor 1
 glx@glx_arb_sync_control@timing -fullscreen -divisor 2
 glx@glx_arb_sync_control@timing -fullscreen -msc-delta 1