brcmsmac: use ARRAY_SIZE on rfseq_updategainu_events

Use the ARRAY_SIZE macro on rfseq_updategainu_events to determine
size of the array. Improvement suggested by coccinelle.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c

@@ -16049,8 +16049,7 @@ static void wlc_phy_workarounds_nphy_gainctrl(struct brcms_phy *pi)
 		wlc_phy_set_rfseq_nphy(pi, NPHY_RFSEQ_UPDATEGAINU,
 				       rfseq_updategainu_events,
 				       rfseq_updategainu_dlys,
-				       sizeof(rfseq_updategainu_events) /
-				       sizeof(rfseq_updategainu_events[0]));
+				       ARRAY_SIZE(rfseq_updategainu_events));
 
 		mod_phy_reg(pi, 0x153, (0xff << 8), (90 << 8));