[gcc r14-7163] RISC-V: Update the comments of riscv_v_ext_mode_p [NFC]

[Pan Li]

https://gcc.gnu.org/g:d79629b316f48c45c0a38d10b8fef1a84beceb46

commit r14-7163-gd79629b316f48c45c0a38d10b8fef1a84beceb46
Author: Pan Li <pan2.li@intel.com>
Date:   Fri Jan 12 10:49:55 2024 +0800

    RISC-V: Update the comments of riscv_v_ext_mode_p [NFC]
    
    gcc/ChangeLog:
    
            * config/riscv/riscv.cc (riscv_v_ext_mode_p): Update the
            comments of predicate func riscv_v_ext_mode_p.
    
    Signed-off-by: Pan Li <pan2.li@intel.com>

Diff:
---
 gcc/config/riscv/riscv.cc | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc
index df9799d9c5e..f829014a589 100644
--- a/gcc/config/riscv/riscv.cc
+++ b/gcc/config/riscv/riscv.cc
@@ -1361,7 +1361,10 @@ riscv_v_ext_vls_mode_p (machine_mode mode)
   return false;
 }
 
-/* Return true if it is either RVV vector mode or RVV tuple mode.  */
+/* Return true if it is either of below modes.
+   1. RVV vector mode.
+   2. RVV tuple mode.
+   3. RVV vls mode.  */
 
 static bool
 riscv_v_ext_mode_p (machine_mode mode)