Update simics level to: 2021-04-08_654c7b_simics.tar.gz 654c7b54554f0e33
Update simics level to: 2021-04-08_654c7b_simics.tar.gz 654c7b54554f0e33

Change-Id: I20bb37f00490a01dbcdb2287331699c7532ca9e1
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/114420
Tested-by: Jenkins Server <8e3f934e4c44875bc48d33da3ea13d93ba9a233f@us.ibm.com>
Reviewed-by: Nicholas E Bofferding <fb8db48116bc8a69e29dd8cdb037246f232f4af5@us.ibm.com>
Tested-by: Nicholas E Bofferding <fb8db48116bc8a69e29dd8cdb037246f232f4af5@us.ibm.com>

open-power/hostboot,open-power/hostboot,open-power/hostboot,open-power/hostboot,open-power/hostboot