igt/kms_fbcon_fbt: Handle ENODEV when checking i915_edp_psr_status for chipset support

If the machine doesn't support PSR, it will return -ENODEV from
i915_edp_psr_status, which we want to interpret as unsupported.
This is in line with what Chris just fixed for FBC.

V2: Copy-pasted to the correct position.

Signed-off-by: Marta Lofstedt <marta.lofstedt@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
1 file changed