Experimental commit and one fix for my last commit.

I think that isFifoBusy bring better sync with VI (video interface) because the CPU emulated threads are waiting for DrawDone in BP Register. So, I do some modifications.
1) Rename "IsFifoBusy" by "isPossibleWaitingSetDrawDone"
2) Only activate isPossibleWaitingSetDrawDone when bFF_GPLinkEnable is true in fifo loop "Inmediate mode" that is because in theory this drawsync function is using in this mode.
3) Deactivate isPossibleWaitingSetDrawDone also in SetFinish in PixelEngine, beside when 32 block is finish.

Please regression in yours games thats can bring some FPS more above all with VPS frame limiter ON (Auto, 60, 50, etc).

- Fix waiting in AbortFrame(), please test mp1/mp2 is fixed again.

Good look! 

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@7123 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Core/Common/Src/VideoBackendBase.h

@@ -55,6 +55,7 @@ struct SCPFifoStruct
 	// So no possiblity to ack the Token irq by the scheduler until some sort of PPC watchdog do its mess.
 	volatile u16 PEToken;
 
+	volatile u32 bFF_GPLinkEnable;
 	volatile u32 bFF_GPReadEnable;
 	volatile u32 bFF_BPEnable;
 	volatile u32 bFF_BPInt;
@@ -113,7 +114,7 @@ public:
 	static void Video_GatherPipeBursted();
 
 	virtual void Video_WaitForFrameFinish() = 0;
-	virtual bool Video_IsFifoBusy() = 0;
+	virtual bool Video_IsPossibleWaitingSetDrawDone() = 0;
 	virtual void Video_AbortFrame() = 0;
 
 	static void PopulateList();
@@ -145,7 +146,7 @@ class VideoBackendHLE : public VideoBackend
 	void Video_SetRendering(bool bEnabled);
 
 	void Video_WaitForFrameFinish();
-	bool Video_IsFifoBusy();
+	bool Video_IsPossibleWaitingSetDrawDone();
 	void Video_AbortFrame();
 };