[gcc(refs/vendors/riscv/heads/gcc-13-with-riscv-opts)] riscv: Fix warning in riscv_regno_ok_for_index_p

[gcc(refs/vendors/riscv/heads/gcc-13-with-riscv-opts)] riscv: Fix warning in riscv_regno_ok_for_index_p

[Jeff Law]

https://gcc.gnu.org/g:c7eec784c8ccbea13496f9890de9775779212398

commit c7eec784c8ccbea13496f9890de9775779212398
Author: Christoph Müllner <christoph.muellner@vrull.eu>
Date:   Mon Jul 17 10:59:15 2023 +0200

    riscv: Fix warning in riscv_regno_ok_for_index_p
    
    The variable `regno` is currently not used in riscv_regno_ok_for_index_p(),
    which triggers a compiler warning. Let's address this.
    
    Fixes: 423604278ed5 ("riscv: Prepare backend for index registers")
    
    Reported-by: Juzhe Zhong <juzhe.zhong@rivai.ai>
    Reported-by: Andreas Schwab <schwab@linux-m68k.org>
    Signed-off-by: Christoph Müllner <christoph.muellner@vrull.eu>
    
    gcc/ChangeLog:
    
            * config/riscv/riscv.cc (riscv_regno_ok_for_index_p):
            Remove parameter name from declaration of unused parameter.
    
    Signed-off-by: Christoph Müllner <christoph.muellner@vrull.eu>
    (cherry picked from commit c29584fc29df0c5075ad57cce5bea447b1d061a3)

Diff:
---
 gcc/config/riscv/riscv.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc
index 6ed735d6983..ae3c034e76e 100644
--- a/gcc/config/riscv/riscv.cc
+++ b/gcc/config/riscv/riscv.cc
@@ -861,7 +861,7 @@ riscv_index_reg_class ()
    but extensions might support that.  */
 
 int
-riscv_regno_ok_for_index_p (int regno)
+riscv_regno_ok_for_index_p (int)
 {
   return 0;
 }