Merge changes I8ca411d5,Ib5f5dd81,I0488e22c into integration

* changes:
  plat: imx: imx8qm: apply clk/pinmux configuration for DEBUG_CONSOLE
  plat: imx: imx8qm: provide debug uart num as build param
  plat: imx: imx8_iomux: fix shift-overflow errors