vfs.dev.write[] and vfs.dev.read[] cannot treat LVM devices.

For example, I have following disk devices.
I'd like to get "vfs.dev.write[mapper/VolGroup00-LogVolVMWare01]", but it returns ZBX_NOTSUPPORTED
#########################################################################

1. df
   Filesystem 1K-blocks Used Available Use% Mounted on
   /dev/sdb1 10153988 9565416 64456 100% /
   tmpfs 3057412 0 3057412 0% /dev/shm
   /dev/sdb8 98118256 79910280 13223812 86% /var/lib/vmware
   /dev/mapper/VolGroup00-LogVolVMWare01
   110437216 103922020 905316 100% /var/lib/vmware/LVM_VMWare01
   /dev/sdc1 240362656 224830024 3322832 99% /var/lib/vmware/LVM_VMWare02

1. cat /proc/diskstats
   1 0 ram0 0 0 0 0 0 0 0 0 0 0 0
   1 1 ram1 0 0 0 0 0 0 0 0 0 0 0
   1 2 ram2 0 0 0 0 0 0 0 0 0 0 0
   1 3 ram3 0 0 0 0 0 0 0 0 0 0 0
   1 4 ram4 0 0 0 0 0 0 0 0 0 0 0
   1 5 ram5 0 0 0 0 0 0 0 0 0 0 0
   1 6 ram6 0 0 0 0 0 0 0 0 0 0 0
   1 7 ram7 0 0 0 0 0 0 0 0 0 0 0
   1 8 ram8 0 0 0 0 0 0 0 0 0 0 0
   1 9 ram9 0 0 0 0 0 0 0 0 0 0 0
   1 10 ram10 0 0 0 0 0 0 0 0 0 0 0
   1 11 ram11 0 0 0 0 0 0 0 0 0 0 0
   1 12 ram12 0 0 0 0 0 0 0 0 0 0 0
   1 13 ram13 0 0 0 0 0 0 0 0 0 0 0
   1 14 ram14 0 0 0 0 0 0 0 0 0 0 0
   1 15 ram15 0 0 0 0 0 0 0 0 0 0 0
   8 0 sda 1654961 152313 55550056 29417338 220612252 1480505653 13611736176 2159922341 0 2294306082 2192725174
   8 1 sda1 410 826 0 0
   8 2 sda2 1807096 55548910 1701458169 726798368
   8 16 sdb 1026519 130631 22693437 7777766 62776012 19146814 655459112 655832480 0 472751459 663786416
   8 17 sdb1 762084 14253276 29390593 235124824
   8 18 sdb2 806 815 0 0
   8 19 sdb3 806 815 0 0
   8 20 sdb4 5 10 0 0
   8 21 sdb5 810 819 0 0
   8 22 sdb6 398 802 0 0
   8 23 sdb7 398 802 0 0
   8 24 sdb8 391893 8435298 52541750 420334000
   8 32 sdc 116153 11234 3362726 725861 33834038 44268352 625042224 2767518537 0 33771182 2768502817
   8 33 sdc1 124462 3339262 78130069 625040992
   253 0 dm-0 55 0 440 408 0 0 0 0 0 25 408
   253 1 dm-1 110 0 880 1025 358 0 2864 13363 0 435 14388
   253 2 dm-2 1806769 0 55546954 34161598 1701466664 0 13611733312 2435789496 0 2294642704 2470671328
   3 0 hda 0 0 0 0 0 0 0 0 0 0 0
   9 0 md0 0 0 0 0 0 0 0 0 0 0 0
   #########################################################################

[Why it occurs]
vfs.dev.write[] and vfs.dev.read[] get device name from argument.
They search same name in /proc/diskstats and If they found same name, they return the statistics values.
But there is no "mapper/VolGroup00-LogVolVMWare01".
"dm-2" is the LVM device name in /proc/diskstats.

So, Zabbix returns ZBX_NOTSUPPORTED

[How to fix]
The current Zabbix is searching device by name in /proc/diskstats.
If Zabbix search it by device major number and minor number, Zabbix can find the LVM device.
It is almost same fix in ZBX-1015

For example, "ls -al /dev/mapper/VolGroup00-LogVolVMWare01" shows LVM device has major number and minor number as "253, 2".
Then, we can find LVM device as "dm-2"

1. ls -al /dev/mapper/VolGroup00-LogVolVMWare01
   brw-rw---- 1 root disk 253, 2 Sep 8 19:39 /dev/mapper/VolGroup00-LogVolVMWare01
2. cat /proc/diskstats |grep "253 2"
   253 2 dm-2 1806769 0 55546954 34161598 1701502889 0 13612023112 2452860745 0 2294837356 2487742578