Add check to wait for BMC standby

This extra check is for QEMU use case when the simulator
is getting started. The check won't be problem for HW
system but a helper for simulator to wait till it boots up.

Change-Id: Ifb82a99f2a41c09e79d980cd39284157ab2eb802
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
2 files changed