[PATCH] Fix pragma packing in ip2 driver

This fixes the pragma packing in the ip2 driver by popping the previous
setting rather than explicitly assuming that the correct setting is 4.

This also gets around a compiler bug in the FRV compiler when building
allmodconfig.

Signed-Off-By: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>