cxl/region: Stop initializing interleave granularity

In preparation for a patch that validates that the region ways setting
is compatible with the granularity setting, the initial granularity
setting needs to start at zero to indicate "unset".

Reviewed-by: Vishal Verma <vishal.l.verma@intel.com>
Reviewed-by: Alison Schofield <alison.schofield@intel.com>
Link: https://lore.kernel.org/r/165853777484.2430596.3423921169034844397.stgit@dwillia2-xfh.jf.intel.com
[djbw: fix up unused variable]
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

Author: djbw

drivers/cxl/core/region.c

@@ -1527,19 +1527,15 @@ static struct cxl_region *devm_cxl_add_region(struct cxl_root_decoder *cxlrd,
 					      enum cxl_decoder_type type)
 {
 	struct cxl_port *port = to_cxl_port(cxlrd->cxlsd.cxld.dev.parent);
-	struct cxl_decoder *cxld = &cxlrd->cxlsd.cxld;
-	struct cxl_region_params *p;
 	struct cxl_region *cxlr;
 	struct device *dev;
 	int rc;
 
 	cxlr = cxl_region_alloc(cxlrd, id);
 	if (IS_ERR(cxlr))
 		return cxlr;
-	p = &cxlr->params;
 	cxlr->mode = mode;
 	cxlr->type = type;
-	p->interleave_granularity = cxld->interleave_granularity;
 
 	dev = &cxlr->dev;
 	rc = dev_set_name(dev, "region%d", id);