brcmsmac: add a conditions for core rev 17 again

This reverts some changes made in this commit:
commit 7234592364
Author: Roland Vossen <rvossen@broadcom.com>
Date:   Mon Feb 14 12:16:45 2011 +0100

    staging: brcm80211: removal of inactive d11 code

The bcm4716 has a rev 17 wireless core and this condition is needed.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Acked-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/brcm80211/brcmsmac/main.c

@@ -1942,7 +1942,8 @@ static bool brcms_b_radio_read_hwdisabled(struct brcms_hardware *wlc_hw)
 		 * accesses phyreg throughput mac. This can be skipped since
 		 * only mac reg is accessed below
 		 */
-		flags |= SICF_PCLKE;
+		if (D11REV_GE(wlc_hw->corerev, 18))
+			flags |= SICF_PCLKE;
 
 		/*
 		 * TODO: test suspend/resume
@@ -2023,7 +2024,8 @@ void brcms_b_corereset(struct brcms_hardware *wlc_hw, u32 flags)
 	 * phyreg throughput mac, AND phy_reset is skipped at early stage when
 	 * band->pi is invalid. need to enable PHY CLK
 	 */
-	flags |= SICF_PCLKE;
+	if (D11REV_GE(wlc_hw->corerev, 18))
+		flags |= SICF_PCLKE;
 
 	/*
 	 * reset the core