Merge branch 'topic/r820t' into patchwork

* topic/r820t: (31 commits)
  [media] r820t: Don't divide the IF by two
  [media] r820t: disable auto gain/VGA setting
  [media] rtl2832: Fix IF calculus
  [media] r820t: put it into automatic gain mode
  [media] r820t: Fix hp_cor filter mask
  [media] r820t: fix PLL calculus
  [media] r820t: Don't put it in standby if not initialized yet
  [media] r820t: avoid rewrite all regs when not needed
  [media] r820t: Allow disabling IMR callibration
  [media] r820t: add a commented code for GPIO
  [media] r820t: add IMR calibrate code
  [media] r820t: proper initialize the PLL register
  [media] r820t: use usleep_range()
  [media] r820t: fix prefix of the r820t_read() function
  [media] r820t: split the function that read cached regs
  [media] r820t: better report signal strength
  [media] r820t: add support for diplexer
  [media] r820t: Show the read data in the bit-reversed order
  [media] r820t: use the second table for 7MHz
  [media] r820t: Invert bits for read ops
  ...