Partially revert 146a35cbb8aff7f (UAPI: (Scripted) Convert #include "..." to #include...

Partially revert 146a35cbb8aff7f (UAPI: (Scripted) Convert #include "..." to #include <path/...> in kernel system headers)

Syntax errors were introduced into include/linux/libfdt.h by the
offending commit, revert the changes made to this file.  The kernel
again compiles, thus restoring harmony and balance to the universe.

Signed-off-by: David Daney <david.daney@cavium.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Dave Jones <davej@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>