[gcc(refs/vendors/riscv/heads/gcc-15-with-riscv-opts)] Increase NUM_ABI_IDS to support RISC-V VLS calling convention variants

[Jeff Law]

https://gcc.gnu.org/g:6aab296faa64ebfb98f62d955826c8658a7fa369

commit 6aab296faa64ebfb98f62d955826c8658a7fa369
Author: Kito Cheng <kito.cheng@sifive.com>
Date:   Fri Aug 8 09:00:59 2025 +0800

    Increase NUM_ABI_IDS to support RISC-V VLS calling convention variants
    
    The RISC-V fixed-length vector calling convention introduces multiple ABI
    variants based on different ABI_VLEN values. Each variant requires a
    separate ABI ID to maintain proper ABI compatibility tracking in GCC.
    Increase NUM_ABI_IDS from 8 to 12 to accommodate these additional ABI
    variants.
    
    gcc/ChangeLog:
    
            * function-abi.h (NUM_ABI_IDS): Increase from 8 to 12.
    
    (cherry picked from commit dc3def267ca538075718290f0e8b8f36026d7115)

Diff:
---
 gcc/function-abi.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/function-abi.h b/gcc/function-abi.h
index edf83c1cb39d..0c5a3bf5b018 100644
--- a/gcc/function-abi.h
+++ b/gcc/function-abi.h
@@ -28,7 +28,7 @@ along with GCC; see the file COPYING3.  If not see
    NUM_ABI_IDS is the maximum number of such ABIs that GCC can handle at once.
    A bitfield with this number of bits can represent any combinaion of the
    supported ABIs.  */
-const size_t NUM_ABI_IDS = 8;
+const size_t NUM_ABI_IDS = 12;
 
 /* Information about one of the target's predefined ABIs.  */
 class predefined_function_abi