drivers/cf9: wait long enough before exiting cf9_reset_system()
drivers/cf9: wait long enough before exiting cf9_reset_system()

Change-Id: Ifa14d4d09d5c6c83365b1a364dacb98d62ce7f75
Tracked-On: https://jira01.devtools.intel.com/browse/OAM-38216
Signed-off-by: Jeremy Compostella <5b4de6d90b3d4185ed5afe686aad4ea88ac71343@intel.com>
Reviewed-on: https://android.intel.com:443/542231

herbert-de-vaucanson/efiwrapper,herbert-de-vaucanson/efiwrapper