ANDROID: GKI: Preserve CRC value for wireless_send_event()

Commit d7c1a9a0 ("wifi: nl80211: validate and configure puncturing
bitmap") and commit 9b89495e ("wifi: nl80211: Allow authentication
frames and set keys on NAN interface") added two entries to the
nl80211_ext_feature_index enum, which caused the CRC value for the
wireless_send_event() symbol to change.

Fix this by hiding the new enum entries during the CRC generation phase.
While the values of NUM_NL80211_EXT_FEATURES and
MAX_NL80211_EXT_FEATURES have changed, it shouldn't be a problem in this
case, since MAX_NL80211_EXT_FEATURES is not used in the kernel source,
and the one usage of NUM_NL80211_EXT_FEATURES remains unchanged.

Bug: 272227555
Bug: 324871355
Change-Id: I8b5be4c39b1ab72f0f2b3c9ff10f15a981a431db
Signed-off-by: Isaac J. Manjarres <isaacmanjarres@google.com>