drivers/intel/gma: Expose full brightness ladder

Our 18-entry BRIG table advertised is only a handful of steps and
identical AC/DC defaults, so after S3, the OS falls back to the
default index if the the cached entry doesn't match.

Populate BRIG with the full 0–100 ladder so every cached index
corresponds to an actual entry.

Change-Id: I319cf3a0ced3bf6021f9e768f0e9bb5529b12ed5
Signed-off-by: Sean Rhodes <sean@starlabs.systems>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/89987
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/drivers/intel/gma/acpi/default_brightness_levels.asl

@@ -4,25 +4,110 @@
 
 Scope (GFX0)
 {
-	Name (BRIG, Package (0x12)
+	Name (BRIG, Package (103)
 	{
 		100, /* default AC */
 		100, /* default Battery */
+		  0,
+		  1,
 		  2,
+		  3,
 		  4,
 		  5,
+		  6,
 		  7,
+		  8,
 		  9,
+		 10,
 		 11,
+		 12,
 		 13,
+		 14,
+		 15,
+		 16,
+		 17,
 		 18,
+		 19,
 		 20,
+		 21,
+		 22,
+		 23,
 		 24,
+		 25,
+		 26,
+		 27,
+		 28,
 		 29,
+		 30,
+		 31,
+		 32,
 		 33,
+		 34,
+		 35,
+		 36,
+		 37,
+		 38,
+		 39,
 		 40,
+		 41,
+		 42,
+		 43,
+		 44,
+		 45,
+		 46,
+		 47,
+		 48,
+		 49,
 		 50,
+		 51,
+		 52,
+		 53,
+		 54,
+		 55,
+		 56,
+		 57,
+		 58,
+		 59,
+		 60,
+		 61,
+		 62,
+		 63,
+		 64,
+		 65,
+		 66,
 		 67,
+		 68,
+		 69,
+		 70,
+		 71,
+		 72,
+		 73,
+		 74,
+		 75,
+		 76,
+		 77,
+		 78,
+		 79,
+		 80,
+		 81,
+		 82,
+		 83,
+		 84,
+		 85,
+		 86,
+		 87,
+		 88,
+		 89,
+		 90,
+		 91,
+		 92,
+		 93,
+		 94,
+		 95,
+		 96,
+		 97,
+		 98,
+		 99,
 		100,
 	})
 }