misc: Replace namespace Trace with lowercase trace

This is what the coding style demands

Change-Id: Ida6a71ad9c2c02cccd584bbaf37a6da751c5b856
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/63891
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
Reviewed-by: Richard Cooper <richard.cooper@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Maintainer: Daniel Carvalho <odanrc@yahoo.com.br>
140 files changed