New error code for invaild loaded cache name.

When loading cache metadata, it should be started with exactly the same name as
it was running previously. Otherwise load should fail and return newly added
error code.

Signed-off-by: Michal Mielewczyk <michal.mielewczyk@intel.com>

inc/ocf_err.h

@@ -116,6 +116,9 @@ typedef enum {
 
 	/** Invalid cache line size */
 	OCF_ERR_INVALID_CACHE_LINE_SIZE,
+
+	/** Invalid cache name loaded*/
+	OCF_ERR_CACHE_NAME_MISMATCH,
 } ocf_error_t;
 
 #endif /* __OCF_ERR_H__ */