qcacld-3.0: Add WAR for ol_txrx.c -Wmissing-prototypes

Currently ol_txrx.c generates warnings when compiled with the GCC
-Wmissing-prototypes switch because it does not include a header file
which exports a prototype for the following functions:
	ol_txrx_set_curchan()
	ol_txrx_get_vdev_struct_mac_addr()
	ol_txrx_get_pdev_from_vdev()
	ol_txrx_print_level_set()
	ol_txrx_fw_stats_cfg()
	ol_txrx_aggr_cfg()

What is interesting about these functions is that they currently are
unused. An "issue report" has been opened for each of these functions
so that the proper disposition can be determined by the Data Path
team. As a WAR so that the -Wmissing-prototypes switch can be enabled
until such time as the issues are correctly resolved, enclose each
function in conditional compilation which will exclude the functions
from the build.

Change-Id: I6220c5ff2c6c3cd40ad33d13bc5c504c75c52018
CRs-Fixed: 1113082

core/dp/txrx/ol_txrx.c

@@ -1898,6 +1898,7 @@ static void ol_txrx_vdev_register(void *pvdev,
 	txrx_ops->tx.tx = ol_tx_data;
 }
 
+#ifdef currently_unused
 /**
  * ol_txrx_set_curchan - Setup the current operating channel of
  * the device
@@ -1912,6 +1913,7 @@ void ol_txrx_set_curchan(ol_txrx_pdev_handle pdev, uint32_t chan_mhz)
 {
 	return;
 }
+#endif
 
 void ol_txrx_set_safemode(ol_txrx_vdev_handle vdev, uint32_t val)
 {
@@ -2408,6 +2410,7 @@ ol_txrx_get_vdev_mac_addr(void *pvdev)
 	return vdev->mac_addr.raw;
 }
 
+#ifdef currently_unused
 /**
  * ol_txrx_get_vdev_struct_mac_addr() - Return handle to struct qdf_mac_addr of
  * vdev
@@ -2420,7 +2423,9 @@ ol_txrx_get_vdev_struct_mac_addr(ol_txrx_vdev_handle vdev)
 {
 	return (struct qdf_mac_addr *)&(vdev->mac_addr);
 }
+#endif
 
+#ifdef currently_unused
 /**
  * ol_txrx_get_pdev_from_vdev() - Return handle to pdev of vdev
  * @vdev: vdev handle
@@ -2431,6 +2436,7 @@ ol_txrx_pdev_handle ol_txrx_get_pdev_from_vdev(ol_txrx_vdev_handle vdev)
 {
 	return vdev->pdev;
 }
+#endif
 
 /**
  * ol_txrx_get_ctrl_pdev_from_vdev() - Return control pdev of vdev
@@ -3300,6 +3306,7 @@ void ol_txrx_discard_tx_pending(ol_txrx_pdev_handle pdev_handle)
 
 unsigned g_txrx_print_level = TXRX_PRINT_LEVEL_ERR;     /* default */
 
+#ifdef currently_unused
 void ol_txrx_print_level_set(unsigned level)
 {
 #ifndef TXRX_PRINT_ENABLE
@@ -3313,6 +3320,7 @@ void ol_txrx_print_level_set(unsigned level)
 	g_txrx_print_level = level;
 #endif
 }
+#endif
 
 struct ol_txrx_stats_req_internal {
 	struct ol_txrx_stats_req base;
@@ -3332,6 +3340,7 @@ struct ol_txrx_stats_req_internal *ol_txrx_u64_to_stats_ptr(uint64_t cookie)
 	return (struct ol_txrx_stats_req_internal *)((size_t) cookie);
 }
 
+#ifdef currently_unused
 void
 ol_txrx_fw_stats_cfg(ol_txrx_vdev_handle vdev,
 		     uint8_t cfg_stats_type, uint32_t cfg_val)
@@ -3341,6 +3350,7 @@ ol_txrx_fw_stats_cfg(ol_txrx_vdev_handle vdev,
 			      0 /* reset mask */,
 			      cfg_stats_type, cfg_val, dummy_cookie);
 }
+#endif
 
 static A_STATUS
 ol_txrx_fw_stats_get(void *pvdev, struct ol_txrx_stats_req *req,
@@ -3617,12 +3627,14 @@ int ol_txrx_debug(ol_txrx_vdev_handle vdev, int debug_specs)
 }
 #endif
 
+#ifdef currently_unused
 int ol_txrx_aggr_cfg(ol_txrx_vdev_handle vdev,
 		     int max_subfrms_ampdu, int max_subfrms_amsdu)
 {
 	return htt_h2t_aggr_cfg_msg(vdev->pdev->htt_pdev,
 				    max_subfrms_ampdu, max_subfrms_amsdu);
 }
+#endif
 
 #if defined(TXRX_DEBUG_LEVEL) && TXRX_DEBUG_LEVEL > 5
 void ol_txrx_pdev_display(ol_txrx_pdev_handle pdev, int indent)