Fix loading of the cpuid module. On non-udev systems, or even on udev

systems where /dev/cpu/0/cpuid is part of the static device node tree,
the previous test would succeed even when the cpuid module isn't
loaded, resulting in missing detections (of coretemp-supported CPU
models in particuler.) Check if the module is loaded by looking in
sysfs instead, this is much more reliable.


git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@5993 7894878c-1315-0410-8ee3-d5d059ff63e0

prog/detect/sensors-detect

@@ -6615,7 +6615,7 @@ sub main
 	      "Do you want to scan for them? This is totally safe. (YES/no): ";
 	unless (<STDIN> =~ /^\s*n/i) {
 		# Load the cpuid driver if needed
-		unless (-e "/dev/cpu/$cpu[0]->{nr}/cpuid") {
+		unless (-e "$sysfs_root/class/cpuid") {
 			load_module("cpuid");
 			udev_settle();
 		}