testsuite: arm: Use effective-target for memset-inline* tests

As these tests are set to execute and require neon hardware to do so,
add the missing dg-require-effective-target arm_neon_hw.

gcc/testsuite/ChangeLog:

	* gcc.target/arm/memset-inline-4.c: Use effective-target
	arm_neon_hw.
	* gcc.target/arm/memset-inline-5.c: Likewise.
	* gcc.target/arm/memset-inline-6.c: Likewise.

Signed-off-by: Torbjörn SVENSSON <torbjorn.svensson@foss.st.com>
3 files changed