rtl8xxxu: Set RX boundary for 8723bu

Set the correct TRXFF boundary for 8723bu.
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.c

@@ -6182,7 +6182,10 @@ static int rtl8xxxu_init_device(struct ieee80211_hw *hw)
 	/*
 	 * Set RX page boundary
 	 */
-	rtl8xxxu_write16(priv, REG_TRXFF_BNDY + 2, 0x27ff);
+	if (priv->rtlchip == 0x8723b)
+		rtl8xxxu_write16(priv, REG_TRXFF_BNDY + 2, 0x3f7f);
+	else
+		rtl8xxxu_write16(priv, REG_TRXFF_BNDY + 2, 0x27ff);
 	/*
 	 * Transfer page size is always 128
 	 */