drivers: dma: clean up header

Move tables declaration as they are only used locally for now

Signed-off-by: Francois Ramu <francois.ramu@st.com>
Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
diff --git a/drivers/dma/dma_stm32.c b/drivers/dma/dma_stm32.c
index 050e7d2..d285da2 100644
--- a/drivers/dma/dma_stm32.c
+++ b/drivers/dma/dma_stm32.c
@@ -24,6 +24,18 @@
 #include <logging/log.h>
 LOG_MODULE_REGISTER(dma_stm32, CONFIG_DMA_LOG_LEVEL);
 
+static u32_t table_m_size[] = {
+	LL_DMA_MDATAALIGN_BYTE,
+	LL_DMA_MDATAALIGN_HALFWORD,
+	LL_DMA_MDATAALIGN_WORD,
+};
+
+static u32_t table_p_size[] = {
+	LL_DMA_PDATAALIGN_BYTE,
+	LL_DMA_PDATAALIGN_HALFWORD,
+	LL_DMA_PDATAALIGN_WORD,
+};
+
 static void dma_stm32_dump_stream_irq(struct device *dev, u32_t id)
 {
 	const struct dma_stm32_config *config = dev->config->config_info;
diff --git a/drivers/dma/dma_stm32.h b/drivers/dma/dma_stm32.h
index c17a365..fca2a74 100644
--- a/drivers/dma/dma_stm32.h
+++ b/drivers/dma/dma_stm32.h
@@ -7,18 +7,6 @@
 #ifndef DMA_STM32_H_
 #define DMA_STM32_H_
 
-static u32_t table_m_size[] = {
-	LL_DMA_MDATAALIGN_BYTE,
-	LL_DMA_MDATAALIGN_HALFWORD,
-	LL_DMA_MDATAALIGN_WORD,
-};
-
-static u32_t table_p_size[] = {
-	LL_DMA_PDATAALIGN_BYTE,
-	LL_DMA_PDATAALIGN_HALFWORD,
-	LL_DMA_PDATAALIGN_WORD,
-};
-
 /* Maximum data sent in single transfer (Bytes) */
 #define DMA_STM32_MAX_DATA_ITEMS	0xffff