[AArch64 Testsuite] Fix fallout from FCM changes.
gcc/testsuite/
* gcc.target/aarch64/scalar_intrinsics.c (force_simd): New.
(test_vceqd_s64): Force arguments to SIMD registers.
(test_vceqzd_s64): Likewise.
(test_vcged_s64): Likewise.
(test_vcled_s64): Likewise.
(test_vcgezd_s64): Likewise.
(test_vcged_u64): Likewise.
(test_vcgtd_s64): Likewise.
(test_vcltd_s64): Likewise.
(test_vcgtzd_s64): Likewise.
(test_vcgtd_u64): Likewise.
(test_vclezd_s64): Likewise.
(test_vcltzd_s64): Likewise.
(test_vtst_s64): Likewise.
(test_vtst_u64): Likewise.
From-SVN: r198493