Linux: use %pI4 if NIPQUAD is not available

Linux: use %pI4 if NIPQUAD is not available

The definition of NIPQUAD has been removed from the kernel headers
in the mainline kernel.  Replace it by using the %pI4 format
specifier which takes the IP address as a single argument.

There should be no change in the output.

This fix is required for 2.6.36.

Reviewed-on: http://gerrit.openafs.org/2542
Tested-by: Derrick Brashear <shadow@dementia.org>
Reviewed-by: Derrick Brashear <shadow@dementia.org>
(cherry-picked from commit d4018b2673e6532543984838290ffb891b970fea)

Reviewed-on: http://gerrit.openafs.org/2551
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>
(cherry picked from commit e2e8881db7757ccac5ce3d5fc5603c40c5b47a43)
Change-Id: I1bbe4f8f24f18d29fb6af98fc6e6f4707def547f
Reviewed-on: http://gerrit.openafs.org/3518
Reviewed-by: Simon Wilkinson <sxw@inf.ed.ac.uk>