tg3: Manage gphy power for CPMU-less devs only

This patch changes the code to only manage the PCIe gphy power for
CPMU-less devices only.  The CPMU takes over management for newer
chips.

Reviewed-by: Benjamin Li <benli@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/tg3.c

@@ -6948,8 +6948,11 @@ static int tg3_chip_reset(struct tg3 *tp)
 		     tr32(GRC_VCPU_EXT_CTRL) & ~GRC_VCPU_EXT_CTRL_HALT_CPU);
 	}
 
-	if (tp->tg3_flags2 & TG3_FLG2_5705_PLUS)
+	/* Manage gphy power for all CPMU absent PCIe devices. */
+	if ((tp->tg3_flags2 & TG3_FLG2_5705_PLUS) &&
+	    !(tp->tg3_flags & TG3_FLAG_CPMU_PRESENT))
 		val |= GRC_MISC_CFG_KEEP_GPHY_POWER;
+
 	tw32(GRC_MISC_CFG, val);
 
 	/* restore 5701 hardware bug workaround write method */