target/arm: Use FPST_A64 in A64 decoder

target/arm: Use FPST_A64 in A64 decoder

In the A64 decoder, use FPST_A64 rather than FPST_FPCR.  By
doing an automated conversion of the whole file we avoid possibly
using more than one fpst value in a set_rmode/op/restore_rmode
sequence.

Patch created with

  perl -p -i -e 's/FPST_FPCR(?!_)/FPST_A64/g' target/arm/tcg/translate-{a64,sve,sme}.c

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20250124162836.2332150-12-peter.maydell@linaro.org