ip_gre: remove duplicate pointer definition

*neigh is defined twice here and will cause the build to fail if
this code is used

Change-Id: I23a6d1e31b96a47f143d0c5c44558cddfc632b06
staging: prima: rebase prima on v3.2.0.9

Change-Id: I9723a253b2e99331b0b7fbf9b681d968d0deb7be
prima: Fix build for GCC 4.7

Change-Id: I05cd4b04d54d39ef39b3130b5f84e59712baefd0