fw-api: CL 8748543 - update fw common interface files

add HTT_TX_FW2WBM_REINJECT_REASON_FLOW_CONTROL def

Change-Id: I7b7a0e92e00af35c3f2386e595400961cc4c6c0c
CRs-Fixed: 2262693

fw/htt.h

@@ -2223,6 +2223,7 @@ typedef enum {
    HTT_TX_FW2WBM_REINJECT_REASON_MCAST,
    HTT_TX_FW2WBM_REINJECT_REASON_ARP,
    HTT_TX_FW2WBM_REINJECT_REASON_DHCP,
+   HTT_TX_FW2WBM_REINJECT_REASON_FLOW_CONTROL,
 
    HTT_TX_FW2WBM_REINJECT_REASON_MAX,
 } htt_tx_fw2wbm_reinject_reason_t;