ACPI: processor: mv processor_pdc.c processor_core.c

We've renamed the old processor_core.c to processor_driver.c, to
convey the idea that it can be built modular and has driver-like
bits.

Now let's re-create a processor_core.c for the bits needed
statically by the rest of the kernel. The contents of processor_pdc.c
are a good starting spot, so let's just rename that file and
complete our three card monte.

Acked-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/include/acpi/processor.h b/include/acpi/processor.h
index 1172c27..7bb0b8b 100644
--- a/include/acpi/processor.h
+++ b/include/acpi/processor.h
@@ -320,7 +320,7 @@
 
 #endif				/* CONFIG_CPU_FREQ */
 
-/* in processor_pdc.c */
+/* in processor_core.c */
 void acpi_processor_set_pdc(acpi_handle handle);
 
 /* in processor_throttling.c */