brcmfmac: use msecs_to_jiffies() instead of calculation using HZ

Minor cleanup using provided macro to convert milliseconds interval
to jiffies in brcmf_cfg80211_escan().
Reviewed-by: Hante Meuleman <hante.meuleman@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieter-paul.giesberts@broadcom.com>
Reviewed-by: Franky Lin <franky.lin@broadcom.com>
Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c

@@ -1115,8 +1115,8 @@ brcmf_cfg80211_escan(struct wiphy *wiphy, struct brcmf_cfg80211_vif *vif,
 		goto scan_out;
 
 	/* Arm scan timeout timer */
-	mod_timer(&cfg->escan_timeout, jiffies +
-			BRCMF_ESCAN_TIMER_INTERVAL_MS * HZ / 1000);
+	mod_timer(&cfg->escan_timeout,
+		  jiffies + msecs_to_jiffies(BRCMF_ESCAN_TIMER_INTERVAL_MS));
 
 	return 0;