Use protocol-specific names in Learning gem5 configs. Now, we should no
longer use the generic names for the controllers (it's deprecated). This
updates Learning gem5.
Website changes coming soon. (Hopefull before I push this...)
Change-Id: I18fc5b8bb0fef7c3b8b5cea8de4f73fc0f66a1b3
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>