klte: fix echo within calls and update mixer paths

(cherry picked from commit 820b63fe87c789219a9a4ed27d82b9989f0d525e)
power_profile.xml: fix typeo on 1728mhtz freq and added 2456Mhtz step

(cherry picked from commit 38a71c5b410e25d82560f2e407590962a36b4045)