sega: add VF4 game IDs, minor rewording

sega/identifiers.md

@@ -322,7 +322,7 @@ Example:
 
 ## Game ID
 
-Seems to have been introduced around the start of ALL.NET and used from Naomi 2/Atomiswave onwards.
+Seems to have been introduced around the start of ALL.NET and used from at least the NAOMI2 and Atomiswave onwards.
 
 Format: `S[BD][A-Z]{2}`. `SC**` may be developer IDs?
 

sega/media.md

@@ -202,7 +202,7 @@ GDS-0008 : MONKEY BALL
 GDS-0009A: DYNAMIC GOLF (VIRTUA GOLF) : EXP
 GDS-0010 : SUPER MAJOR LEAGUE (WORLD SERIES BASEBALL) : EXP
 GDS-0011 : VIRTUA TENNIS (POWER SMASH)
-GDS-0012B: VIRTUA FIGHTER 4
+GDS-0012B: VIRTUA FIGHTER 4 : BDM
         D: ^
 GDS-0013 : シャカっとタンバリン! 2K1
 GDS-0014 : BEACH SPIKERS
@@ -218,7 +218,7 @@ GDS-0023 : DIMM FIRM UPDATE/253-5508-0387
         A: ^ 2.13  [VF4]
         C: ^ 2.17 [VF4E]
         E: ^ 3.17  [VF4FT]
-GDS-0024A: VIRTUA FIGHTER 4 EVOLUTION
+GDS-0024A: VIRTUA FIGHTER 4 EVOLUTION : BFB
         B: ^
 GDS-0025 : INITIAL D : EXP
 GDS-0026A: 頭文字D Arcade Stage Ver.2 : NAOMI2 : JPN
@@ -231,7 +231,7 @@ GDS-0033 : LUPIN THE 3RD - THE SHOOTING
 GDS-0033 : Initial D Ver.3 : EXP
 GDS-0034 : Puyo Pop Fever : EXP
 GDS-0035 :
-GDS-0036A: VIRTUA FIGHTER 4 FINAL TUNED
+GDS-0036A: VIRTUA FIGHTER 4 FINAL TUNED : SBHX
         D: ^
         F: ^
 GDS-0037A: Dragon Treasure II