Decompiled various small files

- Decompiled `code_8006C360.c`
- Decompiled `prenmi_buf.c` (previously `code_8007BE60.c`)
- Decompiled `code_8007BF10.c`
- Documented `sys_ucode.c`

src/code/sys_ucode.c

@@ -1,21 +1,21 @@
 #include <global.h>
 
-u32 func_800D2DF0()
+u32 SysUcode_GetUCodeBoot()
 {
     return &D_80009320;
 }
 
-u32 func_800D2DFC()
+u32 SysUcode_GetUcodeBootSize()
 {
     return (u32)&D_800093F0 - (u32)&D_80009320;
 }
 
-u32 func_800D2E14()
+u32 SysUcode_GetUcode()
 {
     return D_8012DBA0;
 }
 
-u32 func_800D2E20()
+u32 SysUcode_GetUcodeData()
 {
     return D_8012DBA4;
 }