Decompile several boot functions and migrate gvars.c to a more workable format

* func0000244c
* func00002480
* func000024b4
* func000024e8
* func00002510
* func00002538
* func00002560

src/include/gvars/gvars.h

@@ -469,14 +469,20 @@ struct g_vars {
 	/*000704*/ u32 unk000704;
 };
 
+extern u32 var8008ae20;
 extern struct g_vars g_Vars;
 
 extern s32 g_NumTags;
 extern struct tag **g_TagPtrs;
 
+extern u32 var8008de24;
 extern u32 var8008de38;
+extern struct bootbufferthing var8008de48[3];
+extern s32 var8008fa6c;
+extern s32 var8008fa70;
+extern s32 var8008fa74;
 extern u32 var8009cac0;
 extern u32 var8009cac4;
-extern u32 g_8009de24;
+extern u32 var8009de24;
 
 extern u32 g_EepromFlags;

src/include/types.h

@@ -1224,4 +1224,8 @@ struct gvars284 {
 	u32 unk480;
 };
 
+struct bootbufferthing {
+	u8 unk00[2400];
+};
+
 #endif