dmaengine: PL08x: constify channel names and bus_id strings

Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Tested-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

drivers/dma/amba-pl08x.c

@@ -237,7 +237,7 @@ struct pl08x_dma_chan {
 	struct pl08x_phy_chan *phychan;
 	int phychan_hold;
 	struct tasklet_struct tasklet;
-	char *name;
+	const char *name;
 	const struct pl08x_channel_data *cd;
 	dma_addr_t src_addr;
 	dma_addr_t dst_addr;

include/linux/amba/pl08x.h

@@ -58,7 +58,7 @@ enum {
  * these buses (use PL08X_AHB1 | PL08X_AHB2).
  */
 struct pl08x_channel_data {
-	char *bus_id;
+	const char *bus_id;
 	int min_signal;
 	int max_signal;
 	u32 muxval;