board: ti: fdt_ops: make ti_set_fdt_env() const-correct

Make the fdt_map parameter a pointer to const, since the function only
reads the mapping table. This improves API correctness and allows maps
to live in read-only data.

No functional change intended

Signed-off-by: Bhimeswararao Matsa <bhimeswararao.matsa@gmail.com>

board/ti/common/fdt_ops.c

@@ -9,7 +9,7 @@
 #include <stdio.h>
 #include "fdt_ops.h"
 
-void ti_set_fdt_env(const char *board_name, struct ti_fdt_map *fdt_map)
+void ti_set_fdt_env(const char *board_name, const struct ti_fdt_map *fdt_map)
 {
 	char *fdt_file_name = NULL;
 	char fdtfile[TI_FDT_FILE_MAX];

board/ti/common/fdt_ops.h

@@ -37,6 +37,6 @@ struct ti_fdt_map {
  * @board_name: match to search with (max of TI_BOARD_NAME_MAX chars)
  * @fdt_map: NULL terminated array of device tree file name matches.
  */
-void ti_set_fdt_env(const char *board_name, struct ti_fdt_map *fdt_map);
+void ti_set_fdt_env(const char *board_name, const struct ti_fdt_map *fdt_map);
 
 #endif /* __FDT_OPS_H */