arch-arm: fix GDB stub after SVE
The SVE patches made registers longer by increasing NumVecElemPerVecReg,
but the GDB XML was not updated to account for that, and as a result GDB
connections were failing with:
Remote 'g' packet reply is too long
This commit introduces NumVecElemPerSimdVecReg which counts only the SIMD
register sizes to get it back working. SVE GDB support is not added here.
Change-Id: I4191b9f1999ae02b0308863db4cc9b5b16a27d6d
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/20468
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>