gdb/riscv: Make some target description functions constant

Makes more of the interface related to fetching target descriptions
constant.

gdb/ChangeLog:

	* arch/riscv.h (riscv_create_target_description): Make return type
	const.
	* arch/riscv.c (riscv_create_target_description): Likewise.
	* riscv-tdep.c (riscv_find_default_target_description): Likewise.

1 files changed, 1 insertions, 1 deletions

diff --git a/gdb/riscv-tdep.c b/gdb/riscv-tdep.c
index 5965a59..d66fe5c 100644
--- a/gdb/riscv-tdep.c
+++ b/gdb/riscv-tdep.c
@@ -2793,7 +2793,7 @@ static const struct frame_unwind riscv_frame_unwind =
    specifically the bfd object being executed, to guide the selection of a
    suitable default target description.  */
 
-static struct target_desc *
+static const struct target_desc *
 riscv_find_default_target_description (const struct gdbarch_info info)
 {
   struct riscv_gdbarch_features features;