hnvram: Adding PARTITON_UNSPECIFIED

Users can now specify in what partition a write occurs, so
they need a way to say they don't care where it ends up.

See go/fibercl/79870

Change-Id: Iab89c17648f473445913b9210c4ba0cd95245e6e
1 file changed
tree: f3d4b3ae47aee51e20fc4bd1feeee8d9ed4b9aa5
  1. libupgrade/
  2. makehdf