[mpt2sas] While enabling phy, read the current port number from sas iounit page 0

[mpt2sas] While enabling phy, read the current port number from sas iounit page 0
instead of page 1

Orabug: 14040678
The port number is changing after disabling/enabling phys using the SysFS interface
This is because the firmware behavour changed where it would read the the port number
then set it to some different value even though Auto Port Config is turned on.
With this change of behavour in FW, it is possible that the expanders are moved
from one port to another after disabling /enabling phys. This is occuring because
the port number in sas iounit page 1 is not matching up to the current port in
page 0. In order to fix this the driver is modified to read the current
port number from sas iounit page 0 instead of page 1.  Also copy the
port and phy flags over from page 0 to page 1.

Signed-off-by: Nagalakshmi Nandigama <nagalakshmi.nandigama@lsi.com>
Signed-off-by: Maxim Uvarov <maxim.uvarov@oracle.com>