zdev: provide site-specific information in lszdev

lszdev must be modified to share the site-specific configuration
information from the persistent settings. The persistent configuration
array will be read and tabularized based on the site-id input from the
user.

This patch also accommodates the site specific information in the
lszdev --info command. New information about the site-ids are integrated
with the command. For example,

DEVICE dasd-eckd 0.0.f001
  Names              : -
  Modules            : dasd_eckd_mod dasd_mod
  Online             : no
  Exists             : yes
  Persistent         : yes
  Sites              : 1,2

  ATTRIBUTE                     ACTIVE    PERSISTENT  SITE1  SITE2
  cmb_enable                    "0"       "0"         "1"    -
  eer_enabled                   "0"       -           -      -
  erplog                        "0"       -           -      -
  failfast                      "0"       -           -      -
  last_known_reservation_state  "none"    -           -      -
  online                        "0"       "1"         "1"    "1"
  raw_track_access              "0"       -           -      -
  readonly                      "0"       -           -      -
  reservation_policy            "ignore"  -           -      -
  use_diag                      "0"       -           -      -

Each available site specific configuration will be shown as column. The
"Sites" parameter in the above output indicates the available site
configurations and the SITE1 and SITE2 colums indicates the detailed
configuration for the respective sites.

Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Vineeth Vijayan <vneethv@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>

zdev/include/device.h

@@ -116,5 +116,7 @@ struct setting_list *device_get_setting_list(struct device *dev,
 					     int site_id);
 
 config_t device_get_config(struct device *dev);
+char *device_get_sites(struct device *dev);
+bool is_dev_pers(struct device *dev);
 
 #endif /* DEVICE_H */