[PATCH] RISC-V: Remove XFAIL of ssa-dom-cse-2.c

[Juzhe-Zhong]

Confirm RISC-V is able to CSE this case no matter whether we enable RVV or not.

Remove XFAIL,  to fix:
XPASS: gcc.dg/tree-ssa/ssa-dom-cse-2.c scan-tree-dump optimized "return 28;"

gcc/testsuite/ChangeLog:

        * gcc.dg/tree-ssa/ssa-dom-cse-2.c: Remove riscv.

---
 gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-cse-2.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-cse-2.c 
b/gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-cse-2.c
index a879d305971..5c89e3f8698 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-cse-2.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-cse-2.c
@@ -27,4 +27,4 @@ foo ()
    but the loop reads only one element at a time, and DOM cannot resolve these.
    The same happens on powerpc depending on the SIMD support available.  */
 
-/* { dg-final { scan-tree-dump "return 28;" "optimized" { xfail { { alpha*-*-* 
hppa*64*-*-* nvptx*-*-* mmix-knuth-mmixware } || { { { lp64 && { powerpc*-*-* 
sparc*-*-* riscv*-*-* } } || aarch64_sve } || { arm*-*-* && { ! arm_neon } } } 
} } } } */
+/* { dg-final { scan-tree-dump "return 28;" "optimized" { xfail { { alpha*-*-* 
hppa*64*-*-* nvptx*-*-* mmix-knuth-mmixware } || { { { lp64 && { powerpc*-*-* 
sparc*-*-* } } || aarch64_sve } || { arm*-*-* && { ! arm_neon } } } } } } } */
-- 
2.36.3