moved f4ll_cpp imto its own namespace

moved strutil to the application

components/f4ll_cpp/memcpydma.cpp

@@ -7,6 +7,8 @@
 #include <f4ll_cpp/dmahelper.h>
 #include <f4ll_cpp/memcpydma.h>
 
+namespace f4ll_cpp {
+
 MemcpyDma::MemcpyDma(DMA_TypeDef *dma, uint32_t stream) :
 	DmaHelper(dma, stream),
 	m_busy(false)
@@ -33,3 +35,5 @@ void MemcpyDma::HandleDmaIrq(void)
 		m_busy = false;
 	}
 }
+
+}	//	f4ll_cpp