cxl/region: use str_enabled_disabled() instead of ternary operator

Replace ternary operator with str_enabled_disabled() helper to enhance
code readability and consistency.

[dj: Fix spelling in commit log and subject. ]

Signed-off-by: Nai-Chen Cheng <bleach1827@gmail.com>
Reviewed-by: Alison Schofield <alison.schofield@intel.com>
Link: https://patch.msgid.link/20250812-cxl-region-string-choices-v1-1-50200b0bc782@gmail.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>

Author: SimoneCheng

drivers/cxl/core/region.c

@@ -10,6 +10,7 @@
 #include <linux/sort.h>
 #include <linux/idr.h>
 #include <linux/memory-tiers.h>
+#include <linux/string_choices.h>
 #include <cxlmem.h>
 #include <cxl.h>
 #include "core.h"
@@ -1468,9 +1469,7 @@ static int cxl_port_setup_targets(struct cxl_port *port,
 				dev_name(port->uport_dev), dev_name(&port->dev),
 				__func__, cxld->interleave_ways,
 				cxld->interleave_granularity,
-				(cxld->flags & CXL_DECODER_F_ENABLE) ?
-					"enabled" :
-					"disabled",
+				str_enabled_disabled(cxld->flags & CXL_DECODER_F_ENABLE),
 				cxld->hpa_range.start, cxld->hpa_range.end);
 			return -ENXIO;
 		}