igd.asl rewrite

Old igd.asl had inconsistent addresses (between _DOD and actual device)
and ghost devices. Any of those is enough to make brightness on windows
fail and make igd.asl out-of-ACPI-spec. Also old code favoured ridiculous
copying of the same thing 6 times per chipset. Leave only hooking up and
chipset-specific part in chipset directory. Move NVS handling and ACPI-spec
parts to a common file.

Change-Id: I556769e5e28b83e7465e3db689e26c8c0ab44757
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/7472
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <edward.ocallaghan@koparo.com>
Reviewed-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
diff --git a/src/southbridge/intel/i82801ix/lpc.c b/src/southbridge/intel/i82801ix/lpc.c
index de936a3..3cc053b 100644
--- a/src/southbridge/intel/i82801ix/lpc.c
+++ b/src/southbridge/intel/i82801ix/lpc.c
@@ -37,6 +37,7 @@
 #include "i82801ix.h"
 #include "nvs.h"
 #include <southbridge/intel/common/pciehp.h>
+#include <drivers/intel/gma/i915.h>
 
 #define NMI_OFF	0
 
@@ -544,8 +545,13 @@
 	global_nvs_t *gnvs = cbmem_add (CBMEM_ID_ACPI_GNVS, sizeof (*gnvs));
 
 	if (gnvs) {
+		const struct i915_gpu_controller_info *gfx = intel_gma_get_controller_info();
 		memset(gnvs, 0, sizeof (*gnvs));
 		acpi_create_gnvs(gnvs);
+
+		gnvs->ndid = gfx->ndid;
+		memcpy(gnvs->did, gfx->did, sizeof(gnvs->did));
+
 		/* And tell SMI about it */
 		smm_setup_structures(gnvs, NULL, NULL);