[By Steven Scholz <steven.scholz@imc-berlin.de>, 16 Aug 2004]
  
  Since the cpu/ directory gets clobbered with peripheral driver code I

  started cleaning up arch/arm/cpu/arm920t.

  
  I introduced the concept of Soc (system on a chip) into the ./cpu
  directory. That means that code that is cpu (i.e. core) specific
  resides in

  	$(CPUDIR)/

  
  and code that is specific to some SoC (i.e. vendor specific
  peripherals around the core) is moved into

  	$(CPUDIR)/$(SOC)/

  Thus a library/archive "$(CPUDIR)/$(SOC)/lib$(SOC).a" will be build

  and linked. Examples will be

  	arch/arm/cpu/arm920t/imx/
  	arch/arm/cpu/arm920t/s3c24x0

  
  One can select an SoC by passing the name of it to ./mkconfig just
  like
  
  	@./mkconfig $(@:_config=) arm arm920t vcma9 mpl s3c24x0
  
  If there's no VENDOR field (like "mpl" in the above line) one has to
  pass NULL instead:
  
  	@./mkconfig $(@:_config=) arm arm920t mx1ads NULL imx