x86, es7000: misc cleanups

These are cleanups that change the md5 signature:

 - asm/ => linux/ include conversion
 - simplify the code flow of find_unisys_acpi_oem_table()
 - move ACPI methods into one #ifdef block
 - remove 0/NULL initialization of statics
 - simplify/standardize printouts
 - update copyrights
 - more cleanups, pointed out by checkpatch

arch/x86/kernel/es7000_32.o:

   text	   data	    bss	    dec	    hex	filename
   2693	    192	     44	   2929	    b71	es7000_32.o.before
   2688	    192	     44	   2924	    b6c	es7000_32.o.after

Signed-off-by: Ingo Molnar <mingo@elte.hu>