JUTXfb: decompile (#38)

* m_Do_Reset: split and (some) decomp

decompiles:
- my_OSCancelAlarmAll()
- destroyVideo()

* mDoRst::reset(): decompile, plus some supporting code

* split DVD* functions to dvd.h

* mDoRst::resetCallBack(): decompile

* JUTXfb: split

* JUTXfb: decompile (except for almost-matching ctor)

Elaborates JUTVideo and some related stuff.
Decompiles the following functions:
- JUTXfb::initiate()
- JUTXfb::createManager()
- JUTXfb::common_init()
- JUTXfb::destroyManager()
- JUTXfb::~JUTXfb()
- JUTXfb::JUTXfb(): *almost* matching up to regalloc

* clang-format and extern label modifications

Co-authored-by: Pheenoh <pheenoh@gmail.com>

include/functions.h

@@ -261,6 +261,8 @@ void __RAS_OSDisableInterrupts_begin(void);
 u8 dComIfGs_getBottleMax(void);
 
 void mDoDvdErr_ThdCleanup(void);
+void initiate__6JUTXfbFUsUsP7JKRHeapl(void);
+void common_init__6JUTXfbFl(void);
 }
 
 class mDoCPd_c;
@@ -378,6 +380,12 @@ void VISetBlack(s32);
 void VIFlush(void);
 }
 
+extern "C" {
+void VIWaitForRetrace(void);
+void VISetBlack(s32);
+void VIFlush(void);
+}
+
 extern "C" {
 void JUTReport__FiiPCce(int, int, const char*, ...);
 void JUTReportConsole(const char*);