fix the x520 flow control again, since i'm useless.

Reference: /n/atom/patch/applied/i82598fcagain
Date: Fri Jan  3 17:12:18 CET 2014
Signed-off-by: quanstro@quanstro.net

--- /sys/src/nix/k10/ether82598.c	Fri Jan  3 17:11:19 2014
+++ /sys/src/nix/k10/ether82598.c	Fri Jan  3 17:11:20 2014
@@ -229,7 +229,7 @@
 	0xcf60,	"xon rx",
 	0x3f68,	"xoff tx",
 	0xcf68,	"xoff rx",
-	0x4184,	"xon rx",			/* x540 only */
+	0x41a4,	"xon rx",			/* x540 only */
 	0x41a8,	"xoff rx",			/* x540 only */
 	0x405c,	"rx 040",
 	0x4060,	"rx 07f",
@@ -1118,10 +1118,15 @@
 		case 0x10f9:	/* 82599 cx4 */
 		case 0x10fb:	/* 82599 sfi/sfp+ */
 		case 0x10fc:	/* 82599 xaui */
+		case 0x1414:	/* x520 kx4 mezz */
 		case 0x151c:	/* 82599 base t kx/kx4 “niantic” */
+		case 0x154a:	/* x520-4 */
+		case 0x154d:	/* x520-q1 */
+		case 0x1558:	/* x520-q1 */
 			type = i82599;
 			break;
 		case 0x1528:	/* x540-at2 “twinville” */
+		case 0x1560:
 			type = x540;
 			break;
 		default:
--- /sys/src/9/pc/ether82598.c	Fri Jan  3 17:11:22 2014
+++ /sys/src/9/pc/ether82598.c	Fri Jan  3 17:11:23 2014
@@ -229,7 +229,7 @@
 	0xcf60,	"xon rx",
 	0x3f68,	"xoff tx",
 	0xcf68,	"xoff rx",
-	0x4184,	"xon rx",			/* x540 only */
+	0x41a4,	"xon rx",			/* x540 only */
 	0x41a8,	"xoff rx",			/* x540 only */
 	0x405c,	"rx 040",
 	0x4060,	"rx 07f",
@@ -1118,10 +1118,15 @@
 		case 0x10f9:	/* 82599 cx4 */
 		case 0x10fb:	/* 82599 sfi/sfp+ */
 		case 0x10fc:	/* 82599 xaui */
+		case 0x1414:	/* x520 kx4 mezz */
 		case 0x151c:	/* 82599 base t kx/kx4 “niantic” */
+		case 0x154a:	/* x520-4 */
+		case 0x154d:	/* x520-q1 */
+		case 0x1558:	/* x520-q1 */
 			type = i82599;
 			break;
 		case 0x1528:	/* x540-at2 “twinville” */
+		case 0x1560:
 			type = x540;
 			break;
 		default:
--- /sys/src/9/pcpae/ether82598.c	Fri Jan  3 17:11:24 2014
+++ /sys/src/9/pcpae/ether82598.c	Fri Jan  3 17:11:25 2014
@@ -229,7 +229,7 @@
 	0xcf60,	"xon rx",
 	0x3f68,	"xoff tx",
 	0xcf68,	"xoff rx",
-	0x4184,	"xon rx",			/* x540 only */
+	0x41a4,	"xon rx",			/* x540 only */
 	0x41a8,	"xoff rx",			/* x540 only */
 	0x405c,	"rx 040",
 	0x4060,	"rx 07f",
@@ -1118,10 +1118,15 @@
 		case 0x10f9:	/* 82599 cx4 */
 		case 0x10fb:	/* 82599 sfi/sfp+ */
 		case 0x10fc:	/* 82599 xaui */
+		case 0x1414:	/* x520 kx4 mezz */
 		case 0x151c:	/* 82599 base t kx/kx4 “niantic” */
+		case 0x154a:	/* x520-4 */
+		case 0x154d:	/* x520-q1 */
+		case 0x1558:	/* x520-q1 */
 			type = i82599;
 			break;
 		case 0x1528:	/* x540-at2 “twinville” */
+		case 0x1560:
 			type = x540;
 			break;
 		default: