defconfig: Enable CONFIG_WLAN_FEATURE_RX_WAKELOCK

qcom_rx_wakelock needs to be acquired to prevent device from
going in suspend state while running throughput when USB is
disconnected with LCD off.

CONFIG_WLAN_FEATURE_RX_WAKELOCK is defined to enable feature
based macro in wlan host driver and subsequently initialize
qcom_rx_wakelock.

Change-Id: I40911b2be3b7497caf524985d39ff16828c6d2af
CRs-Fixed: 971578
Signed-off-by: Himanshu Agarwal <himanaga@codeaurora.org>