platform/x86: intel_pmc_core: Change driver to a module

Allow the driver to be a module since builtin_pci_driver funtionality is no
longer needed.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

drivers/platform/x86/Kconfig

@@ -974,7 +974,7 @@ config INTEL_IMR
 	  If you are running on a Galileo/Quark say Y here.
 
 config INTEL_PMC_CORE
-	bool "Intel PMC Core driver"
+	tristate "Intel PMC Core driver"
 	depends on PCI
 	---help---
 	  The Intel Platform Controller Hub for Intel Core SoCs provides access