backports: remove IWLWIFI_P2P from iwlwifi defconfig

This symbol is obsolete, it was removed upstream, so just
remove it from the defconfig file as well.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>

backport/defconfigs/iwlwifi

diff --git a/backport/defconfigs/iwlwifi b/backport/defconfigs/iwlwifi
index 9563c8b..fe7c6c1 100644
--- a/backport/defconfigs/iwlwifi
+++ b/backport/defconfigs/iwlwifi
@@ -15,4 +15,3 @@
 CPTCFG_IWLWIFI_DEBUG=y
 CPTCFG_IWLWIFI_DEBUGFS=y
 CPTCFG_IWLWIFI_DEVICE_TRACING=y
-CPTCFG_IWLWIFI_P2P=y