fdtput: add delete node and property function

add the delete node and property function for fdtput.

usage:
1) delete nodes
   fdtput -r <options> <dt file> [<node>...]
2) delete properties
   fdtput -d <options> <dt file> <node> [<property>...]

Signed-off-by: Wang Long <long.wanglong@huawei.com>
2 files changed