It is now described by the node property NVRAM_PROP_LAYOUT. The data associated with this property is an array of NvramPropChunk.
Each chunk in NVRAM now has a specific ID (1..254).
There are also two special IDs, NVRAM_KERNEL and NVRAM_RESERVED. NVRAM_KERNEL describes a section reserved for microkernel data, such as boot information. The NVRAM_RESERVED sections should never be written to or read but can be used to protect sections used by firmware.
In addition, the M48txx driver has been enhanced to include the new property M48TXX_PROP_REG_OFF. This property is used to define device register offset dynamically. The enhancement to the M48txx driver includes support for the m48t37v chip.