drm/i915/bios: Remove version number comment from DEVICE_HANDLE_EFP4

DEVICE_HANDLE_EFP4 has actually been in use since the very beginning,
or at least something has been occupying that bit because old
VBTs actually use it, and it definitely looks to be about external
displays given how its used. So let's ignore what the current spec
claims and remove the misleading version number comment.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240503122449.27266-3-ville.syrjala@linux.intel.comAcked-by: Jani Nikula <jani.nikula@intel.com>

drivers/gpu/drm/i915/display/intel_vbt_defs.h

@@ -201,7 +201,7 @@ struct bdb_general_features {
 #define DEVICE_HANDLE_EFP1	0x0004
 #define DEVICE_HANDLE_EFP2	0x0040
 #define DEVICE_HANDLE_EFP3	0x0020
-#define DEVICE_HANDLE_EFP4	0x0010 /* 194+ */
+#define DEVICE_HANDLE_EFP4	0x0010
 #define DEVICE_HANDLE_EFP5	0x0002 /* 215+ */
 #define DEVICE_HANDLE_EFP6	0x0001 /* 217+ */
 #define DEVICE_HANDLE_EFP7	0x0100 /* 217+ */