Refactor imx drivers and introduce support for

Merge series from Laurentiu Mihalcea <laurentiu.mihalcea@nxp.com>:

A rather aggressive but arguably much needed refactorization of the SOF
imx drivers. The refactorization is meant to address the code duplication
in the imx drivers and decrease the coding effort required for introducing
a new imx platform.

After refactorization and imx95 introduction, only two drivers remain:
imx8 (meant for the imx8 series: imx8 (imx8qm), imx8x (imx8qxp), imx8m,
and imx8ulp) and imx9 (meant for the imx9 series: imx95 (for now)).

The series also includes the introduction of the imx95 driver.