iio: Move iio userspace applications out of staging

This patch moves iio userspace applications out of staging, to tools/iio/
and adds a Makefile in order to compile them easily. It also adds tools/iio/
to MAINTAINERS file.
Signed-off-by: Roberta Dobrescu <roberta.dobrescu@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

MAINTAINERS

@@ -4871,6 +4871,7 @@ S:	Maintained
 F:	drivers/iio/
 F:	drivers/staging/iio/
 F:	include/linux/iio/
+F:	tools/iio/
 
 IKANOS/ADI EAGLE ADSL USB DRIVER
 M:	Matthieu Castet <castet.matthieu@free.fr>

tools/iio/Makefile

+CC = gcc
+CFLAGS = -Wall -g
+
+all: iio_event_monitor lsiio generic_buffer
+
+iio_event_monitor: iio_event_monitor.o iio_utils.o
+
+lsiio: lsiio.o iio_utils.o
+
+generic_buffer: generic_buffer.o iio_utils.o
+
+%.o: %.c iio_utils.h
+
+.PHONY: clean
+clean:
+	rm -f *.o iio_event_monitor lsiio generic_buffer