[committed][Patch]arm: Fix typo in testcase mve-vsub_1.c

[Dennis Zhang via Gcc-patches]

This patch fixes a typo reported at 
https://gcc.gnu.org/pipermail/gcc-patches/2020-November/558478.html

gcc/testsuite/
        * gcc.target/arm/simd/mve-vsub_1.c: Fix typo.
        Remove needless dg-additional-options.

Cheers,
Dennis
diff --git a/gcc/testsuite/gcc.target/arm/simd/mve-vsub_1.c b/gcc/testsuite/gcc.target/arm/simd/mve-vsub_1.c
index cb3ef3a14e0..842e5c6a30b 100644
--- a/gcc/testsuite/gcc.target/arm/simd/mve-vsub_1.c
+++ b/gcc/testsuite/gcc.target/arm/simd/mve-vsub_1.c
@@ -1,7 +1,6 @@
 /* { dg-do compile } */
 /* { dg-require-effective-target arm_v8_1m_mve_fp_ok } */
 /* { dg-add-options arm_v8_1m_mve_fp } */
-/* { dg -additional-options "-O3 -funsafe-math-optimizations" } */
 /* { dg-additional-options "-O3" } */
 
 #include <stdint.h>