Add test cases and expected outputs for 
FMLA 2d_2d_d[], 4s_4s_s[], 2s_2s_s[]
FMLS 2d_2d_d[], 4s_4s_s[], 2s_2s_s[]
PRFM (immediate)

Unfortunately huge diff for arm64/fp_and_simd.stdout.exp because the
new cases are not at the end, and the random data for all after it is
different.  ToDo: reset RNG after each test.



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14679 a5019735-40e9-0310-863c-91ae7b9d1cf9