cxl/pci: Remove locked check for dvsec_range_allowed()

Remove the CXL_DECODER_F_LOCK check to be permissive of platform BIOSes
that allow CXL.mem to be remapped.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/167640370085.935665.13128321011001358077.stgit@dwillia2-xfh.jf.intel.com


Signed-off-by: Dan Williams <dan.j.williams@intel.com>