Removed port related information while returing location

Earlier function used to return the entire physical slot location
including port information if any. Now it returns slot information
only till adapter level, not the port level.
Signed-off-by: NVenkat R B <vrbagal1@linux.vnet.ibm.com>

avocado/utils/pci.py

@@ -23,8 +23,7 @@ Module for all PCI devices related functions.
 
 import re
 import os
-from .genio import read_file
-from . import process
+from . import process, genio
 
 
 def get_domains():
@@ -173,14 +172,17 @@ def get_slot_from_sysfs(full_pci_address):
 
     :param full_pci_address: Full PCI address including domain (0000:03:00.0)
 
-    :return: slot of PCI address from sysfs.
+    :return: Removed port related details using re, only returns till
+             physical slot of the adapter.
     """
     if not os.path.isfile('/sys/bus/pci/devices/%s/devspec' % full_pci_address):
         return
-    devspec = read_file("/sys/bus/pci/devices/%s/devspec" % full_pci_address)
+    devspec = genio.read_file("/sys/bus/pci/devices/%s/devspec"
+                              % full_pci_address)
     if not os.path.isfile("/proc/device-tree/%s/ibm,loc-code" % devspec):
         return
-    slot = read_file("/proc/device-tree/%s/ibm,loc-code" % devspec)
+    slot = genio.read_file("/proc/device-tree/%s/ibm,loc-code" % devspec)
+    slot = re.match(r'((\w+)[.])+(\w+)-P(\d+)-C(\d+)|Slot(\d+)', slot).group()
     return slot