Merge tag 'imx-clk-4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo...

Pull i.MX updates from Shawn Guo:

"The i.MX clock updates for 4.4:
 - A couple of fixes on i.MX31 and i.MX35 clock initialization functions
   which makes mxc_timer_init() currently be called twice for DT boot.
 - Increase i.MX6UL AXI bus clock rate to 264MHz which is the optimal
   design target.
 - Add a few missing clocks, ADC clock for i.MX7D, OCOTP clock for
   Vybrid, and SPDIF_GCLK for i.MX6.
 - A series from Lucas to fix early debug UART clock setup.  This is
   currently a one-off fix for i.MX platform, and can be extended to
   become a generic solution later."

* tag 'imx-clk-4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux:
  clk: imx6: Add SPDIF_GCLK clock in clock tree
  clk: imx7d: add ADC root clock
  clk: imx31: Do not call mxc_timer_init twice when booting with DT
  clk: imx7d: retain early UART clocks during kernel init
  clk: imx6: retain early UART clocks during kernel init
  clk: imx5: retain early UART clocks during kernel init
  clk: imx35: retain early UART clocks during kernel init
  clk: imx31: retain early UART clocks during kernel init
  clk: imx27: retain early UART clocks during kernel init
  clk: imx25: retain early UART clocks during kernel init
  clk: imx: add common logic to detect early UART usage
  clk: imx35: Do not call mxc_timer_init twice when booting with DT
  clk: clk-vf610: Add clock for Vybrid OCOTP controller
  clk: imx: increase AXI clock rate to 264MHz for i.MX6UL