Fix a bunch of random typos in comments and logging.

Also update the comment headers for two functions in GCMemcard.cpp.

Source/Core/AudioCommon/Src/OpenALStream.cpp

@@ -59,7 +59,7 @@ bool OpenALStream::Start()
 		PanicAlertT("OpenAL: can't find sound devices");
 	}
 
-	// Initialise DPL2 parameters
+	// Initialize DPL2 parameters
 	dpl2reset();
 
 	soundTouch.clear();

Source/Core/AudioCommon/Src/XAudio2Stream.cpp

@@ -94,7 +94,7 @@ bool XAudio2::Start()
 {
 	HRESULT hr;
 
-	// callback dosent seem to run on a speecific cpu anyways
+	// callback doesn't seem to run on a specific cpu anyways
 	IXAudio2* xaudptr;
 	if (FAILED(hr = XAudio2Create(&xaudptr, 0, XAUDIO2_DEFAULT_PROCESSOR)))
 	{