arch-arm: Rename AdvSIMD instruction pool

The decoding function was wrongly named decodeNeon3SameExtra,
referring to the "AdvSIMD three same Extra" instruction pool

This might be an old name as I can only find the
"AdvSIMD *scalar* three same Extra" in the Arm arm. The
encoding space reserved to the pool bears the
"Advanced SIMD three-register extension" name; we
therefore rename the function to decodeNeon3RegExtension

Change-Id: I056da8f0c7808935d12a4b05490d30654178071f
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Richard Cooper <richard.cooper@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/70724
Tested-by: kokoro <noreply+kokoro@google.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
2 files changed