gen2/sysarray: Improve signal names
gen2/sysarray: Improve signal names

Provides better signal names to assist with interpreting traces in
gtkwave.

Signed-off-by: Alan Green <97e77871b5fcc4941bebceb4338c97c1fd149f8c@google.com>

google/CFU-Playground,google/CFU-Playground,google/CFU-Playground,google/CFU-Playground