Replace MemoryCard251 setting with generic MemoryCardSize

This allows for a broader range of game-specific memory card sizes to
be configured.

Data/Sys/GameSettings/GDK.ini

@@ -4,7 +4,7 @@
 # Values set here will override the main Dolphin settings.
 # This game does not work properly with large memorycards, use a 251 block card
 # see https://www.nintendo.com/consumer/memorycard1019.jsp
-MemoryCard251 = True
+MemoryCardSize = 2
 
 [OnLoad]
 # Add memory patches to be loaded once on boot here.

Data/Sys/GameSettings/GDQ.ini

@@ -4,7 +4,7 @@
 # Values set here will override the main Dolphin settings.
 # This game does not work properly with large memorycards, use a 251 block card
 # see https://www.nintendo.com/consumer/memorycard1019.jsp
-MemoryCard251 = True
+MemoryCardSize = 2
 
 [OnLoad]
 # Add memory patches to be loaded once on boot here.

Data/Sys/GameSettings/GDX.ini

@@ -2,4 +2,4 @@
 
 [Core]
 # Values set here will override the main Dolphin settings.
-MemoryCard251 = True
+MemoryCardSize = 2

Data/Sys/GameSettings/GWL.ini

@@ -2,7 +2,7 @@
 
 [Core]
 # Values set here will override the main Dolphin settings.
-MemoryCard251 = True
+MemoryCardSize = 2
 
 [OnLoad]
 # Add memory patches to be loaded once on boot here.
@@ -14,4 +14,4 @@ MemoryCard251 = True
 # Add action replay cheats here.
 
 [Video_Hacks]
-ImmediateXFBEnable = False
+ImmediateXFBEnable = False

Data/Sys/GameSettings/GWT.ini

@@ -4,7 +4,7 @@
 # Values set here will override the main Dolphin settings.
 # This game does not work properly with large memorycards, use a 251 block card
 # see https://www.nintendo.com/consumer/memorycard1019.jsp
-MemoryCard251 = True
+MemoryCardSize = 2
 CPUThread = False
 
 [OnLoad]