On my matrox millennium II, aux/vga failed with

mga2164w: can't attach mga2164wmmio segment

This patch adds the segment.

Reference: /n/sources/patch/applied/matrox
Date: Thu Nov 17 05:37:34 CET 2005

--- /sys/src/9/pc/vgamga2164w.c	Thu Nov 17 05:30:28 2005
+++ /sys/src/9/pc/vgamga2164w.c	Thu Nov 17 05:30:27 2005
@@ -58,11 +58,13 @@
 		scr->mmio = vmap(p->mem[0].bar&~0x0F, p->mem[0].size);
 		if(scr->mmio == nil)
 			return;
+		addvgaseg("mga2164wmmio", p->mem[0].bar&~0x0F, p->mem[0].size);
 		vgalinearaddr(scr, p->mem[1].bar&~0x0F, 8*MB);
 	}else{
 		scr->mmio = vmap(p->mem[1].bar&~0x0F, p->mem[1].size);
 		if(scr->mmio == nil)
 			return;
+		addvgaseg("mga2164wmmio", p->mem[1].bar&~0x0F, p->mem[1].size);
 		vgalinearaddr(scr, p->mem[0].bar&~0x0F, 16*MB);
 	}
 	if(scr->paddr)