qcacld-3.0: Fix compile issue
If WLAN_SUPPORT_TWT or WLAN_TWT_CONV_SUPPORTED not defined, FEATURE_SET
is defined, function wlan_twt_get_feature_info() will be called by
wma_set_feature_set_info(). However wlan_twt_get_feature_info() is not
declaration.
Change-Id: I31b1e5c6520adf4dc495356d45fc89f481c9962e
CRs-Fixed: 3637229