[TG3]: Clean up grc_local_ctrl usage.

Make the code more readable by only flipping the specific
bits that need to change each register write.

Signed-off-by: Grant Grundler (grundler@parisc-linux.org)
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/tg3.c

@@ -893,7 +893,7 @@ static void tg3_frob_aux_power(struct tg3 *tp)
 			      GRC_LCLCTRL_GPIO_OUTPUT1));
 			udelay(100);
 		} else {
-			int no_gpio2;
+			u32 no_gpio2;
 			u32 grc_local_ctrl;
 
 			if (tp_peer != tp &&
@@ -901,8 +901,8 @@ static void tg3_frob_aux_power(struct tg3 *tp)
 				return;
 
 			/* On 5753 and variants, GPIO2 cannot be used. */
-			no_gpio2 = (tp->nic_sram_data_cfg &
-				    NIC_SRAM_DATA_CFG_NO_GPIO2) != 0;
+			no_gpio2 = tp->nic_sram_data_cfg &
+				    NIC_SRAM_DATA_CFG_NO_GPIO2;
 
 			grc_local_ctrl = GRC_LCLCTRL_GPIO_OE0 |
 					 GRC_LCLCTRL_GPIO_OE1 |
@@ -917,26 +917,14 @@ static void tg3_frob_aux_power(struct tg3 *tp)
 						grc_local_ctrl);
 			udelay(100);
 
-			grc_local_ctrl = GRC_LCLCTRL_GPIO_OE0 |
-					 GRC_LCLCTRL_GPIO_OE1 |
-					 GRC_LCLCTRL_GPIO_OE2 |
-					 GRC_LCLCTRL_GPIO_OUTPUT0 |
-					 GRC_LCLCTRL_GPIO_OUTPUT1 |
-					 GRC_LCLCTRL_GPIO_OUTPUT2;
-			if (no_gpio2) {
-				grc_local_ctrl &= ~(GRC_LCLCTRL_GPIO_OE2 |
-						    GRC_LCLCTRL_GPIO_OUTPUT2);
-			}
+			grc_local_ctrl |= GRC_LCLCTRL_GPIO_OUTPUT0;
+
 			tw32_f(GRC_LOCAL_CTRL, tp->grc_local_ctrl |
 						grc_local_ctrl);
 			udelay(100);
 
-			grc_local_ctrl = GRC_LCLCTRL_GPIO_OE0 |
-					 GRC_LCLCTRL_GPIO_OE1 |
-					 GRC_LCLCTRL_GPIO_OE2 |
-					 GRC_LCLCTRL_GPIO_OUTPUT0 |
-					 GRC_LCLCTRL_GPIO_OUTPUT1;
 			if (!no_gpio2) {
+				grc_local_ctrl &= ~GRC_LCLCTRL_GPIO_OUTPUT2;
 				tw32_f(GRC_LOCAL_CTRL, tp->grc_local_ctrl |
 				       grc_local_ctrl);
 				udelay(100);