treewide: Drop ACPI_VIDEO_DEVICE macro

It was always defined to the same value, and only used twice.

Change-Id: I2736eb7ea2cf15475f7bb99d7d12450730eb8be0
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40864
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/ec/lenovo/h8/acpi/ec.asl

@@ -141,13 +141,12 @@ Device(EC)
 		BRIGHTNESS_DOWN()
 	}
 
-#ifdef ACPI_VIDEO_DEVICE
 	/* Next display GPE */
 	Method(_Q16, 0, NotSerialized)
 	{
-		Notify (ACPI_VIDEO_DEVICE, 0x82)
+		Notify (\_SB.PCI0.GFX0, 0x82)
 	}
-#endif
+
 	/* AC status change: present */
 	Method(_Q26, 0, NotSerialized)
 	{