igt@kms_big_fb@subtests - skip - unsupported configuration

https://gfx-ci.igk.intel.com/cibuglog-ng/testresult/1845091042?query_key=d2e0e7fde17ff5a27271db47522ee2b248282196

Using IGT_SRANDOM=1721268681 for randomisation
Opened device: /dev/dri/card0
Max driver framebuffer size 16384x16384
RAM: 31758 MiB, GPU address space: 268435456 MiB, GGTT mappable size: 16384 MiB
Starting subtest: linear-32bpp-rotate-270
Max usable framebuffer size for format XR24(0x34325258) / modifier 0x0: 16384x16384
Using (pipe A + HDMI-A-3) to run the subtest.
unsupported configuration
Subtest linear-32bpp-rotate-270: SKIP (0.012s)