tests: Move old quick regressions back into their original set
tests: Move old quick regressions back into their original set

realview64-simple-atomic and realview64-simple-timing had been moved
to the long list by:

https://gem5-review.googlesource.com/c/public/gem5/+/22686

in order to reduce computation time.
Since the timeout has been increased on kokoro we can safely put them
back where they were

Change-Id: Ib86f02b8ef493f450509b9f826a80faaec9ef579
Signed-off-by: Giacomo Travaglini <8eef13a4f970e2e9372c8d26ad0737b760f99c02@arm.com>
Reviewed-by: Nikos Nikoleris <b6a1b3cd9d36c44e9eeb16bc870df3cb2a0cf469@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/25025
Reviewed-by: Jason Lowe-Power <68c46a606457643eab92053c1c05574abb26f861@lowepower.com>
Maintainer: Bobby R. Bruce <b9dba908ffb6c6d8ffe449cc88b3709c13c485c2@ucdavis.edu>
Tested-by: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>

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