radio: RTC6226: Make the rtc6226 driver compatible with QTI platform

Moved the power on functionality under set control ioctl.
Removed the blocker code for tune, seek operation.
Added code for posting event to user space as part
of interrupt handling.
Add support to power on/off rtc6226 chip and enable.

CRs-Fixed: 2525362
Change-Id: I61cea2d59a57ae7395971c7f8493582abedf5038
Signed-off-by: himta ram <hram@codeaurora.org>