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landonf
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2017-03-23T19:29:12.988144Z
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[mips/broadcom]: Early boot NVRAM support

Add support for early boot access to NVRAM variables, using a new
bhnd_nvram_data_getvar_direct() API to support zero-allocation direct
reading of NVRAM variables from a bhnd_nvram_io instance backed by the
CFE NVRAM device.

Approved by:	adrian (mentor)
Differential Revision:	https://reviews.freebsd.org/D9913

END