cxl/region: fix format string for resource_size_t

cxl/region: fix format string for resource_size_t

The size of this type is architecture specific, and the recommended
way to print it portably is through the custom %pap format string.

Fixes: d6602e25819d ("cxl/region: Add support to indicate region has extended linear cache")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>> ---
Reviewed-by: Alison Schofield <alison.schofield@intel.com>
Link: https://patch.msgid.link/20251204095237.1032528-1-arnd@kernel.org
Signed-off-by: Dave Jiang <dave.jiang@intel.com>