{cpu,soc}/intel: deduplicate cpu code

Move a whole bunch of copy-pasta code from soc/intel/{bdw,skl,cnl,icl,
tgl,ehl,jsl,adl} and cpu/intel/{hsw,model_*} to cpu/intel/common.

This change just moves the code. Rework is done in CB:46588.

Change-Id: Ib0cc834de8492d59c423317598e1c11847a0b1ab
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46274
Reviewed-by:  Felix Singer <felixsinger@posteo.net>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/intel/icelake/Kconfig

@@ -32,6 +32,7 @@ config CPU_SPECIFIC_OPTIONS
 	select REG_SCRIPT
 	select PMC_GLOBAL_RESET_ENABLE_LOCK
 	select PMC_LOW_POWER_MODE_PROGRAM
+	select CPU_INTEL_COMMON
 	select CPU_INTEL_COMMON_SMM
 	select SOC_INTEL_COMMON
 	select SOC_INTEL_COMMON_ACPI_WAKE_SOURCE