qcacld-3.0: Increase HTT Rx Ring

The firmware would like host to initially populate all 2K entries,
so that fw shadow ring will always have 1K entries to fetch after
the initial population of 512 entries to each mac.

Change-Id: I5f19a1e2693f54f9d7938b723d0d57487f842daf
CRs-Fixed: 1006872

core/dp/htt/htt_rx.c

@@ -81,8 +81,9 @@
 #define HTT_RX_HOST_LATENCY_MAX_MS 20 /* ms */	/* very conservative */
 #endif
 
+ /* very conservative to ensure enough buffers are allocated */
 #ifndef HTT_RX_HOST_LATENCY_WORST_LIKELY_MS
-#define HTT_RX_HOST_LATENCY_WORST_LIKELY_MS 10 /* ms */	/* conservative */
+#define HTT_RX_HOST_LATENCY_WORST_LIKELY_MS 20
 #endif
 
 #ifndef HTT_RX_RING_REFILL_RETRY_TIME_MS
@@ -203,7 +204,9 @@ static int htt_rx_ring_fill_level(struct htt_pdev_t *pdev)
 
 	size = ol_cfg_max_thruput_mbps(pdev->ctrl_pdev) *
 		1000 /* 1e6 bps/mbps / 1e3 ms per sec = 1000 */  /
-		8 * HTT_RX_AVG_FRM_BYTES * HTT_RX_HOST_LATENCY_WORST_LIKELY_MS;
+		(8 * HTT_RX_AVG_FRM_BYTES) * HTT_RX_HOST_LATENCY_WORST_LIKELY_MS;
+
+	size = qdf_get_pwr2(size);
 	/*
 	 * Make sure the fill level is at least 1 less than the ring size.
 	 * Leaving 1 element empty allows the SW to easily distinguish