ANDROID: update abi for ieee80211_get_channel_khz and ieee80211_channel_to_freq_khz

which is needed by ath10k_core.ko, otherwise will get the following ismod error:
    [    3.101175] init: Loading module /lib/modules/ath10k_core.ko with args ''
    [    3.119678] ath10k_core: Unknown symbol ieee80211_channel_to_freq_khz (err -2)
    [    3.159716] init: Failed to insmod '/lib/modules/ath10k_core.ko' with args '': No such file or directory
    [    3.169337] init: LoadWithAliases was unable to load ath10k_core
    [    3.175760] init: Failed to load kernel modules
    [    3.180872] init: InitFatalReboot: signal 6

Updated via:
    $ ./build/abi/bootstrap
    $ <export PATH and LD_LIBRARY_PATH>
    $ BUILD_CONFIG=common/build.config.db845c build/build_abi.sh --update

Not sure why they were not added by the following commit for db845c:
    61837660 ("ANDROID: ABI: update ABI after 6GHz bad support")

Test: boot tested with db845c build

Fixes: 61837660 ("ANDROID: ABI: update ABI after 6GHz bad support")
Fixes: c5940511 ("BACKPORT: cfg80211: express channels with a KHz component")

Signed-off-by: Yongqin Liu <yongqin.liu@linaro.org>
Change-Id: Id868dc501744052de9aaa7c450cb7a667cc2f87e