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The BPMP firmware takes some time to initialise its state on exiting
System Suspend state. The CPU needs to synchronize with the BPMP during
this process to avoid any race conditions. This patch suspends and resumes
the BPMP interface across a System Suspend cycle, to fix this race.

Change-Id: I82a61d12ef3eee267bdd8d4386bed23397fbfd2d
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>