Fix many warnings (#195)

* Fix many warnings, mostly when using functions without including headers, and mostly in libultra files. Included a few warning ignores as well

* Add another warning fix

* Revert trailing comma for LogicUpdateRates

include/PR/os_libc.h

@@ -2,7 +2,6 @@
 #define _OS_LIBC_H_
 
 #include "ultratypes.h"
-
 // Old deprecated functions from strings.h, replaced by memcpy/memset.
 extern void bcopy(const void *, void *, size_t);
 extern void bzero(void *, size_t);

include/PR/os_pi.h

@@ -94,4 +94,6 @@ s32 osPiRawReadIo(u32 devAddr, u32 *data);
 
 s32 osPiRawStartDma(s32 dir, u32 cart_addr, void *dram_addr, size_t size);
 s32 osEPiRawStartDma(OSPiHandle *piHandle, s32 dir, u32 cart_addr, void *dram_addr, size_t size);
+s32 osEPiRawWriteIo(OSPiHandle *, u32 , u32);
+
 #endif

include/PR/os_vi.h

@@ -87,6 +87,7 @@ void osViSetEvent(OSMesgQueue *mq, OSMesg msg, u32 retraceCount);
 void osViBlack(u8 active);
 void osViSetSpecialFeatures(u32 func);
 void osViSwapBuffer(void *vaddr);
+void osYieldThread(void);
 
 
 #define OS_VI_NTSC_LPN1		0	/* NTSC */