platform/x86: pmc_atom: improve critclk_systems matching for Siemens PCs

platform/x86: pmc_atom: improve critclk_systems matching for Siemens PCs

Siemens industrial PCs unfortunately can not always be properly
identified the way we used to. An earlier commit introduced code that
allows proper identification without looking at DMI strings that could
differ based on product branding.
Switch over to that proper way and revert commits that used to collect
the machines based on unstable strings.

Fixes: 648e921888ad ("clk: x86: Stop marking clocks as CLK_IS_CRITICAL")
Fixes: e8796c6c69d1 ("platform/x86: pmc_atom: Add Siemens CONNECT ...")
Fixes: f110d252ae79 ("platform/x86: pmc_atom: Add Siemens SIMATIC ...")
Fixes: ad0d315b4d4e ("platform/x86: pmc_atom: Add Siemens SIMATIC ...")
Tested-by: Michael Haener <michael.haener@siemens.com>
Signed-off-by: Henning Schild <henning.schild@siemens.com>
Link: https://lore.kernel.org/r/20211213120502.20661-5-henning.schild@siemens.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>