soc/intel/common/sgx: Define and use soc_fill_sgx_param()

To remove chip.h dependency from SGX common code
- Create API soc_fill_sgx_param() and use it in sgx.c
- Implement same API for skylake/kabylake
- define sgx_param structure

Also include intelblocks/sgx.h instead of soc/msr.h

Change-Id: I358f0817bec5dd6cd147a645675b5688969a04e0
Signed-off-by: Pratik Prajapati <pratikkumar.v.prajapati@intel.com>
Reviewed-on: https://review.coreboot.org/21528
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/soc/intel/skylake/cpu.c

@@ -504,3 +504,18 @@ void cpu_lock_sgx_memory(void)
 		wrmsr(MSR_LT_LOCK_MEMORY, msr);
 	}
 }
+
+int soc_fill_sgx_param(struct sgx_param *sgx_param)
+{
+	device_t dev = SA_DEV_ROOT;
+	assert(dev != NULL);
+	config_t *conf = dev->chip_info;
+
+	if (!conf) {
+		printk(BIOS_ERR, "Failed to get chip_info for SGX param\n");
+		return -1;
+	}
+
+	sgx_param->enable = conf->sgx_enable;
+	return 0;
+}