UPDATE 2-Liberty buys cable operator Kabel BW from EQT

sources (Adds analyst comment, details of funding) FRANKFURT, March 21 (Reuters) - Media mogul John Malone's Liberty Global (LBTYA.O) will buy Kabel BW [KBWHL.UL]... * KabelBW valued at 3.16 billion euros in deal * CVC declined to raise its bid -...