sysfs_devices_system_cpu should be a sysfs_type

Otherwise the following denials occur on mako:

<5>[    2.494246] type=1400 audit(1382544550.200:4): avc:  denied  { associate } for  pid=1 comm="init" name="time_in_state" dev="sysfs" ino=17444 scontext=u:object_r:sy
sfs_devices_system_cpu:s0 tcontext=u:object_r:sysfs:s0 tclass=filesystem
<5>[    2.494735] type=1400 audit(1382544550.200:5): avc:  denied  { associate } for  pid=1 comm="init" name="total_trans" dev="sysfs" ino=17443 scontext=u:object_r:sysf
s_devices_system_cpu:s0 tcontext=u:object_r:sysfs:s0 tclass=filesystem
<5>[    2.495162] type=1400 audit(1382544550.200:6): avc:  denied  { associate } for  pid=1 comm="init" name="stats" dev="sysfs" ino=17442 scontext=u:object_r:sysfs_devi
ces_system_cpu:s0 tcontext=u:object_r:sysfs:s0 tclass=filesystem
<5>[    2.495620] type=1400 audit(1382544550.200:7): avc:  denied  { associate } for  pid=1 comm="init" name="scaling_governor" dev="sysfs" ino=17435 scontext=u:object_r
:sysfs_devices_system_cpu:s0 tcontext=u:object_r:sysfs:s0 tclass=filesystem
<5>[    2.496047] type=1400 audit(1382544550.200:8): avc:  denied  { associate } for  pid=1 comm="init" name="cpuinfo_transition_latency" dev="sysfs" ino=17429 scontext=
u:object_r:sysfs_devices_system_cpu:s0 tcontext=u:object_r:sysfs:s0 tclass=filesystem
<5>[    2.496505] type=1400 audit(1382544550.200:9): avc:  denied  { associate } for  pid=1 comm="init" name="scaling_available_frequencies" dev="sysfs" ino=17439 sconte
xt=u:object_r:sysfs_devices_system_cpu:s0 tcontext=u:object_r:sysfs:s0 tclass=filesystem
<5>[    2.496963] type=1400 audit(1382544550.200:10): avc:  denied  { associate } for  pid=1 comm="init" name="scaling_driver" dev="sysfs" ino=17436 scontext=u:object_r:
sysfs_devices_system_cpu:s0 tcontext=u:object_r:sysfs:s0 tclass=filesystem

Change-Id: I584a1cf61cb871a38be4d3b308cef03e64cfda8e

file.te

@@ -13,6 +13,8 @@ type sysfs_writable, fs_type, sysfs_type, mlstrustedobject;
 type sysfs_bluetooth_writable, fs_type, sysfs_type, mlstrustedobject;
 type sysfs_nfc_power_writable, fs_type, sysfs_type, mlstrustedobject;
 type sysfs_wake_lock, fs_type, sysfs_type;
+# /sys/devices/system/cpu
+type sysfs_devices_system_cpu, fs_type, sysfs_type;
 type inotify, fs_type, mlstrustedobject;
 type devpts, fs_type, mlstrustedobject;
 type tmpfs, fs_type;
@@ -82,8 +84,6 @@ type security_file, file_type;
 type bluetooth_efs_file, file_type;
 # Downloaded files
 type download_file, file_type;
-# /sys/devices/system/cpu
-type sysfs_devices_system_cpu, file_type;
 
 # Socket types
 type adbd_socket, file_type;