cxl/pci: Remove duplicated implementation of waiting for memory_info_valid

cxl/pci: Remove duplicated implementation of waiting for memory_info_valid

commit ce17ad0d5498 ("cxl: Wait Memory_Info_Valid before access memory
related info") added another implementation, which is
cxl_dvsec_mem_range_valid(), of waiting for memory_info_valid without
realizing it duplicated wait_for_valid(). Remove wait_for_valid() and
retain cxl_dvsec_mem_range_valid() as the former is hardcoded to check
only the Memory_Info_Valid bit of DVSEC range 1, while the latter allows
for selection between DVSEC range 1 or 2 via parameter.

Suggested-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Yanfei Xu <yanfei.xu@intel.com>
Reviewed-by: Alison Schofield <alison.schofield@intel.com>
Link: https://patch.msgid.link/20240828084231.1378789-3-yanfei.xu@intel.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>