moved f4ll_cpp imto its own namespace

moved strutil to the application

components/f4ll_cpp/dmahelper.cpp

@@ -9,6 +9,9 @@
 #define MOCKABLE(x) x
 #endif
 
+namespace f4ll_cpp
+{
+
 DmaHelper::DmaHelper(DMA_TypeDef *dma, uint32_t stream)
 {
 	m_dma = dma;
@@ -80,3 +83,4 @@ uint32_t DmaHelper::_GetTcMask(uint32_t stream)
 	return tcMasks[stream];
 }
 
+}	//	f4ll_cpp