Clean up Japanese APNs

 * Rename and rearrange Japanese APNs to make intelligible.

Change-Id: I628012eb5a2cdc1b4e95ca9a6cf1eaa88eb88b31
Allow reading of cpufreq attributes

 * Various tools might want to use these values without writing to
   them. Set world readable for all nodes.

Change-Id: I5521ca0104e9f21b2e3fdb3469485f887ee50f28
Add apns/eri for Boost Mobile

Change-Id: I01bb82afe9a7a35d0a309491fe96da34655ec9c3
Add Japanese APNs/eri for au, docomo MVNO, EMOBILE and SoftBank

* APN information *
au: http://b00111.blogspot.jp/2013/04/sim-apn-au-ltesim-3gsim-lte-net-au-net.html
SoftBank: http://b00111.blogspot.jp/2011/07/simapnsimsimsim.html
EMOBILE: https://android.googlesource.com/device/sample/+/master/etc/apns-full-conf.xml
b-mobile: http://www.bmobile.ne.jp/devices/apn_data.html

* authtype *
0 is for no authentication
1 is for PAP authentication
2 is for CHAP authentication
3 is for CHAP or PAP, whatever is available

Change-Id: Ib76ced71fa0efe3125db7f97271a6cdf979dbf90