drm/i915/bios: Flag "VBIOS only" VBT data blocks

Several data blocks are mean to be consumbed by VBIOS only.
Flag them as such.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240503122449.27266-8-ville.syrjala@linux.intel.comAcked-by: Jani Nikula <jani.nikula@intel.com>

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

@@ -144,15 +144,15 @@ enum bdb_block_id {
 	BDB_OLD_TOGGLE_LIST		= 3,
 	BDB_MODE_SUPPORT_LIST		= 4,
 	BDB_GENERIC_MODE_TABLE		= 5,
-	BDB_EXT_MMIO_REGS		= 6,
-	BDB_SWF_IO			= 7,
-	BDB_SWF_MMIO			= 8,
+	BDB_EXT_MMIO_REGS		= 6, /* VBIOS only */
+	BDB_SWF_IO			= 7, /* VBIOS only */
+	BDB_SWF_MMIO			= 8, /* VBIOS only */
 	BDB_PSR				= 9,
 	BDB_MODE_REMOVAL_TABLE		= 10,
 	BDB_CHILD_DEVICE_TABLE		= 11,
 	BDB_DRIVER_FEATURES		= 12,
 	BDB_DRIVER_PERSISTENCE		= 13,
-	BDB_EXT_TABLE_PTRS		= 14,
+	BDB_EXT_TABLE_PTRS		= 14, /* VBIOS only */
 	BDB_DOT_CLOCK_OVERRIDE		= 15,
 	BDB_DISPLAY_SELECT		= 16,
 	BDB_DRIVER_ROTATION		= 18,
@@ -174,7 +174,7 @@ enum bdb_block_id {
 	BDB_MIPI_SEQUENCE		= 53,
 	BDB_COMPRESSION_PARAMETERS	= 56,
 	BDB_GENERIC_DTD			= 58,
-	BDB_SKIP			= 254, /* VBIOS private block, ignore */
+	BDB_SKIP			= 254, /* VBIOS only */
 };
 
 /*