platform-drivers-x86 for v5.5-2

* Add support of APUv4 and fix an assignment of simswap GPIO.
* Add Siemens CONNECT X300 to DMI table to avoid stuck during boot.
* Correct arguments of WMI call on HP Envy x360 15-cp0xxx model.
* Fix the mlx-bootctl sysfs attributes to be device related.

The following is an automated git shortlog grouped by driver:

hp-wmi:
 -  Make buffer for HPWMI_FEATURE2_QUERY 128 bytes

pcengines-apuv2:
 -  Spelling fixes in the driver
 -  detect apuv4 board
 -  fix simswap GPIO assignment

platform/mellanox:
 -  fix the mlx-bootctl sysfs

pmc_atom:
 -  Add Siemens CONNECT X300 to critclk_systems DMI table
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