ACPI / CPPC: Fix potential memory leak

Commit 337aadff (ACPI: Introduce CPU performance controls using CPPC)
leads to the following static checker warning:

        drivers/acpi/cppc_acpi.c:527 acpi_cppc_processor_probe()
        warn: overwrite may leak 'cpc_ptr'

Fix the warning by removing the bogus per-CPU pointer dereference.

Fixes: 337aadff (ACPI: Introduce CPU performance controls using CPPC)
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Ashwin Chaugule <ashwin.chaugule@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/cppc_acpi.c

@@ -524,7 +524,6 @@ int acpi_cppc_processor_probe(struct acpi_processor *pr)
 	return 0;
 
 out_free:
-	cpc_ptr = per_cpu(cpc_desc_ptr, pr->id);
 	kfree(cpc_ptr);
 
 out_buf_free: