Revert "kobject: modify kobject_get_path() to take a const *"

This reverts commit f3ffd869 which is
33a0a1e3 upstream.

It messes with the CRC for kobject_get_path().  It will be reverted at
the next ABI break.

Bug: 161946584
Change-Id: I446172f8ab446dce5eedeb1a1bd3b9a5c36acd23
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>