cpu-o3: Add Data Abort handler for Atomic Instructions
cpu-o3: Add Data Abort handler for Atomic Instructions

Bug fixing patch for Data Abort exception when executing an
atomic instruction. You can see the details in this JIRA ticket:
https://gem5.atlassian.net/browse/GEM5-784

Change-Id: I79e7113efd8157fba61b6d4a0b0c09bc6f85ec29
Signed-off-by: Víctor Soria <3624bf50caf3ef4d21a7251a1aba8abd7f84b803@bsc.es>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/35295
Reviewed-by: Giacomo Travaglini <8eef13a4f970e2e9372c8d26ad0737b760f99c02@arm.com>
Maintainer: Giacomo Travaglini <8eef13a4f970e2e9372c8d26ad0737b760f99c02@arm.com>
Tested-by: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>

gem5/gem5,gem5/gem5,gem5/gem5,gem5/gem5,gem5/gem5,gem5/gem5,gem5/gem5