staging: rtl8192e: rename RxPktPendingTimer to rx_pkt_pending_timer in rx_ts_record struct

Rename RxPktPendingTimer to rx_pkt_pending_timer to silence a checkpatch
warning about CamelCase.

Signed-off-by: William Durand <will+git@drnd.me>
Link: https://lore.kernel.org/r/20210301215335.767-6-will+git@drnd.me


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>