wireless-regdb: Add 5 Ghz rules for Kazakhstan (KZ) Thx @Razziell

Add rules for 5150-5250 MHz, 5250-5350 MHz, and 5470-5725 Mhz
based on the documents at [1] and [2].

v2: Also add DFS region

[1] http://mic.gov.kz/sites/default/files/pages/pravila_prisvoeniya_polos_chastot_no34.pdf
[2] http://adilet.zan.kz/rus/docs/P000001379_