mem-ruby: Bloom filters - Remove in/decrement

mem-ruby: Bloom filters - Remove in/decrement

Increment and decrement were functions created to supply the
different naming convention used by the counting bloom filter.
They were removed, and the set and unset functions were used
in their place instead, as in the other filters.

Change-Id: I45732bdfa3083add0a975f374a0f3560003e9d09
Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/18729
Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>