soc/intel/skylake: Make use of common thermal code for SKL

This patch ensures skylake soc is using common thermal code
from intel common block.

TEST=Build and boot soraka

Change-Id: I0812daa3536051918ccac973fde8d7f4f949609d
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34648
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Aamir Bohra <aamir.bohra@intel.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/intel/skylake/Kconfig

@@ -69,6 +69,7 @@ config CPU_SPECIFIC_OPTIONS
 	select SOC_INTEL_COMMON_BLOCK_SMM_IO_TRAP
 	select SOC_INTEL_COMMON_BLOCK_UART
 	select SOC_INTEL_COMMON_BLOCK_XHCI_ELOG
+	select SOC_INTEL_COMMON_BLOCK_THERMAL
 	select SOC_INTEL_COMMON_PCH_BASE
 	select SOC_INTEL_COMMON_NHLT
 	select SOC_INTEL_COMMON_RESET