console: ast2400: Indicate SP has met configuration requirements
console: ast2400: Indicate SP has met configuration requirements

If the service processor has pre-configured the hardware to the state
required by the host firmware it can set a bit to indicate this. If the
bit is set, avoid touching the UART configuration.

Change-Id: I96d228b5d89749eb531522e4ae90396b47776c43
Signed-off-by: Andrew Jeffery <f8d12726b50f34e506b99227014c92d61d1be0a5@au1.ibm.com>
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/62506
Tested-by: Jenkins Server <8e3f934e4c44875bc48d33da3ea13d93ba9a233f@us.ibm.com>
Tested-by: Jenkins OP Build CI <e610bd72261d3c0a48f1e8ae36832ab00774d426@us.ibm.com>
Tested-by: FSP CI Jenkins <aa9e4d9ac7cd25905e9c0dd36d4150516e73dd86@us.ibm.com>
Reviewed-by: Dean Sanner <3b8f978f111a0718dcf88848e092ac780da17ab3@us.ibm.com>
Tested-by: Jenkins OP HW <0eb0fff262f74a65a832afbcc7b153e391c9a3fd@us.ibm.com>
Reviewed-by: Nicholas E. Bofferding <fb8db48116bc8a69e29dd8cdb037246f232f4af5@us.ibm.com>
Disable-CI: Nicholas E. Bofferding <fb8db48116bc8a69e29dd8cdb037246f232f4af5@us.ibm.com>
Disable-CI: Daniel M. Crowell <912029ca9254ac7b5854e56910561d682e1fa2d0@us.ibm.com>
Reviewed-by: Daniel M. Crowell <912029ca9254ac7b5854e56910561d682e1fa2d0@us.ibm.com>

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