DiscIO: Don't use all uppercase for enum values

Also removing some prefixes that we don't need now that we're
using enum classes instead of plain enums.

Source/Core/DiscIO/Enums.h

@@ -14,40 +14,40 @@ namespace DiscIO
 
 enum class Platform
 {
-  GAMECUBE_DISC = 0,
-  WII_DISC,
-  WII_WAD,
-  ELF_DOL,
-  NUMBER_OF_PLATFORMS
+  GameCubeDisc = 0,
+  WiiDisc,
+  WiiWAD,
+  ELFOrDOL,
+  NumberOfPlatforms
 };
 
 enum class Country
 {
-  COUNTRY_EUROPE = 0,
-  COUNTRY_JAPAN,
-  COUNTRY_USA,
-  COUNTRY_AUSTRALIA,
-  COUNTRY_FRANCE,
-  COUNTRY_GERMANY,
-  COUNTRY_ITALY,
-  COUNTRY_KOREA,
-  COUNTRY_NETHERLANDS,
-  COUNTRY_RUSSIA,
-  COUNTRY_SPAIN,
-  COUNTRY_TAIWAN,
-  COUNTRY_WORLD,
-  COUNTRY_UNKNOWN,
-  NUMBER_OF_COUNTRIES
+  Europe = 0,
+  Japan,
+  USA,
+  Australia,
+  France,
+  Germany,
+  Italy,
+  Korea,
+  Netherlands,
+  Russia,
+  Spain,
+  Taiwan,
+  World,
+  Unknown,
+  NumberOfCountries
 };
 
 // Regions 0 - 2 and 4 match Nintendo's GameCube/Wii region numbering.
 enum class Region
 {
-  NTSC_J = 0,          // Japan and Taiwan (and South Korea for GameCube only)
-  NTSC_U = 1,          // Mainly North America
-  PAL = 2,             // Mainly Europe and Oceania
-  UNKNOWN_REGION = 3,  // 3 seems to be unused? Anyway, we need an UNKNOWN_REGION. Let's put it here
-  NTSC_K = 4           // South Korea (Wii only)
+  NTSC_J = 0,   // Japan and Taiwan (and South Korea for GameCube only)
+  NTSC_U = 1,   // Mainly North America
+  PAL = 2,      // Mainly Europe and Oceania
+  Unknown = 3,  // 3 seems to be unused? Anyway, we need an Unknown entry. Let's put it here
+  NTSC_K = 4    // South Korea (Wii only)
 };
 
 // Languages 0 - 9 match Nintendo's Wii language numbering.
@@ -55,17 +55,17 @@ enum class Region
 // NTSC GameCubes only support one language and thus don't number languages.
 enum class Language
 {
-  LANGUAGE_JAPANESE = 0,
-  LANGUAGE_ENGLISH = 1,
-  LANGUAGE_GERMAN = 2,
-  LANGUAGE_FRENCH = 3,
-  LANGUAGE_SPANISH = 4,
-  LANGUAGE_ITALIAN = 5,
-  LANGUAGE_DUTCH = 6,
-  LANGUAGE_SIMPLIFIED_CHINESE = 7,
-  LANGUAGE_TRADITIONAL_CHINESE = 8,
-  LANGUAGE_KOREAN = 9,
-  LANGUAGE_UNKNOWN
+  Japanese = 0,
+  English = 1,
+  German = 2,
+  French = 3,
+  Spanish = 4,
+  Italian = 5,
+  Dutch = 6,
+  SimplifiedChinese = 7,
+  TraditionalChinese = 8,
+  Korean = 9,
+  Unknown
 };
 
 std::string GetName(Country country, bool translate);