libdasd: Provide function to read ese sysfs attribute

Provide a function to determine whether a DASD is an Extent Space
Efficient (ESE) volume.

Reviewed-by: Stefan Haberland <sth@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>

include/lib/dasd_sys.h

@@ -15,6 +15,7 @@
 #include <stdio.h>
 
 int dasd_sys_raw_track_access(char *);
+int dasd_sys_ese(char *);
 int dasd_reset_chpid(char *, char *);
 int dasd_get_host_access_count(char *device);