MFC r348194, r348196, r348204, r348207: loader/fdt pnpmatch
r348194:
loader: Add pnp functions for autoloading modules based on linker.hints
This adds some new commands to loader :
- pnpmatch
This takes a pnpinfo string as argument and tries to find a kernel module
associated with it. -v and -d option are available and are the same as in
devmatch (v is verbose, d dumps the hints).
- pnpload
This takes a pnpinfo string as argument and tries to load a kernel module
associated with it.
- pnpautoload
This will attempt to load every kernel module for each buses. Each buses are
probed, the probe function will generate pnpinfo string and load kernel module
associated with it if it exists.
Only simplebus for FDT system is implemented for now.
Since we need the dtb and overlays to be applied before searching the tree
fdt_devmatch_next will load and apply the dtb + overlays.
All the pnp parsing code comes from devmatch and is the same at 99%.
r348196:
loader: Remove unused variable
r348204:
Remove yet another unused variable.
r348207:
Initialize a variable to fix build with GCC.
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