x86 PM: rename 32-bit files in arch/x86/power

Rename cpu.c, suspend.c and swsusp.S in arch/x86/power to cpu_32.c,
hibernate_32.c and hibernate_asm_32.S, respectively, and update the
purpose and copyright information in these files.

Update the Makefile in arch/x86/power to reflect the above changes.

Signed-off-by: Rafael J. Wysocki <[e-mail]>
Acked-by: Pavel Machek <[e-mail]>
Signed-off-by: Ingo Molnar <[e-mail]>
Signed-off-by: Thomas Gleixner <[e-mail]>

arch/x86/power/Makefile

···
         obj-$(CONFIG_PM)		+= suspend_64.o
         obj-$(CONFIG_HIBERNATION)	+= hibernate_asm_64.o
 else
-	obj-$(CONFIG_PM)		+= cpu.o
-	obj-$(CONFIG_HIBERNATION)	+= swsusp.o suspend.o
+	obj-$(CONFIG_PM)		+= cpu_32.o
+	obj-$(CONFIG_HIBERNATION)	+= hibernate_32.o hibernate_asm_32.o
 endif

arch/x86/power/cpu.c arch/x86/power/cpu_32.c

···
  	savesegment(ss, ctxt->ss);
 
 	/*
-	 * control registers 
+	 * control registers
 	 */
 	ctxt->cr0 = read_cr0();
 	ctxt->cr2 = read_cr2();

arch/x86/power/suspend.c arch/x86/power/hibernate_32.c

···
 /*
- * Suspend support specific for i386 - temporary page tables
+ * Hibernation support specific for i386 - temporary page tables
  *
  * Distribute under GPLv2
  *

arch/x86/power/swsusp.S arch/x86/power/hibernate_asm_32.S

···
 .text
 
-/* Originally gcc generated, modified by hand
- *
+/*
  * This may not use any stack, nor any variable that is not "NoSave":
  *
  * Its rewriting one kernel image with another. What is stack in "old"