arch-arm: Correct target EL field in TLBI operations

arch-arm: Correct target EL field in TLBI operations

Some TLB Invalidation operations affecting the EL2 translation regime
were marked as targeting EL1 instead of EL2

Change-Id: I77821eec7a409e9df6a6814855f9a375832ffe74
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Jan-Peter Larsson <jan-peter.larsson@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/18388
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>