be2iscsi: Format the MAC_ADDR with sysfs_format_mac.

be2iscsi: Format the MAC_ADDR with sysfs_format_mac.

 The MAC_ADDR stored in driver private structure is of
 unsigned char data type but strlcpy parameters is of
 signed char data type. This conversion of data types
 lead to change in the value.This changed value is passed
 to the upper layer and junk characters were displayed
 when "iscsiadm -m iface" command was run.

 In case of iSCSI boot, since the the MAC_ADDR was coming
 junk the boot was also not working

 Patch submitted to upstream kernel

Signed-off-by: John Soni Jose <sony.john-n@emulex.com>
Signed-off-by: Jayamohan Kallickal <jayamohan.kallickal@emulex.com>