Add nanosleep path to bootloader console
Add nanosleep path to bootloader console

Nanosleep in between calls to handleMMIO

Change-Id: I4704d7891a471b28d25438d1df286f727ea52c2e
RTC:209583
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/84348
Tested-by: Jenkins Server <8e3f934e4c44875bc48d33da3ea13d93ba9a233f@us.ibm.com>
Reviewed-by: Nicholas E Bofferding <fb8db48116bc8a69e29dd8cdb037246f232f4af5@us.ibm.com>
Reviewed-by: Ilya Smirnov <2c7a6ec38cfb553b896499595cca9c656159f2a4@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