sysinfo: only dump #r/nvram on amd64,386

right now, theres no kernel that stores hostowner keys
in #r/nvram, but this could change in the future. so
only dump #r/nvram on the pc where we know that its
not used to hold keys.

rc/bin/sysinfo

@@ -21,6 +21,7 @@ fn print{
 	logprog pci -v
 	logprog aux/cpuid
 	logprog aux/icanhasmsi
+	logprog aux/icanhasvmx
 	logprog aux/pcmcia
 	logprog cat '#u/usb/ctl'
 	logprog cat '#S/sdctl'
@@ -33,9 +34,12 @@ fn print{
 			logprog cat $i/ifstats
 		}
 	}
+	if(test -e '#v/vgactl'){
 		logprog cat '#v/vgactl'
 		echo '@{rfork n; aux/realemu; aux/vga -p}'
 		@{rfork n; aux/realemu; aux/vga -p}
+	}
+	if(~ $cputype 386 amd64)
 		logprog xd -x1 '#r/nvram'
 	logprog cat '#A/audiostat'
 	logprog cat '#A/volume'