testsuite: remove xfail for arm_mve from ssa-dom-cse-2.c [PR124361] gcc/testsuite/ChangeLog: PR testsuite/124361 * gcc.dg/tree-ssa/ssa-dom-cse-2.c: Remove xfail for arm_mve. Signed-off-by: Torbjörn SVENSSON <torbjorn.svensson@foss.st.com>