debugfs: updates from upstream
kernel.org commits
cfc94cdf8e0f14e692a5a40ef3cc10f464b2511b debugfs: add rename for debugfs files
9505e6375640fc61d92d36c8e9f25a6a218f3f57 debugfs: Implement debugfs_remove_recursive()
5e07878787ad07361571150230cc3a8d522ae046 debugfs: add helpers for exporting a size_t simple value
8adb711f3668b034e7b956fac951ed08b53e0d55 debugfs: introduce stub for debugfs_create_size_t() when DEBUG_FS=n
5ee810072175042775e39bdd3eaaa68884c27805 Fix "multiple definition of `debugfs_create_size_t'"