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>

src/mainboard/emulation/qemu-q35/mainboard.c

@@ -25,6 +25,7 @@
 #include <pc80/keyboard.h>
 #include <arch/io.h>
 #include <console/console.h>
+#include <drivers/intel/gma/i915.h>
 
 #define Q35_PAM0            0x90
 
@@ -33,6 +34,19 @@ static const unsigned char qemu_q35_irqs[] = {
 	10, 10, 11, 11,
 };
 
+struct i915_gpu_controller_info gfx_controller_info = {
+	.ndid = 3,
+	.did = {
+		0x80000100, 0x80000240, 0x80000410, 0x80000410, 0x00000005
+	}
+};
+
+const struct i915_gpu_controller_info *
+intel_gma_get_controller_info(void)
+{	
+	return &gfx_controller_info;
+}
+
 static void qemu_nb_init(device_t dev)
 {
 	/* Map memory at 0xc0000 - 0xfffff */