iio.h: sync to upstream kernels

sync the iio_event_type, iio_modifier, from upstream kernel commits:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/include/uapi/linux/iio/types.h?id=835e699ef82adfc85ac4cc3f1f237c1adfdefd20
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/include/uapi/linux/iio/types.h?id=bcc57a48eaee63a71983996c4c9d89ce7cbf55d9
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/include/uapi/linux/iio/types.h?id=dcedf14553810cd6bbf7227c995beb4548e0859d
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/include/uapi/linux/iio/types.h?id=a1a5cfe70cd29a59a9a85290dfe95ed1c8df1193

Signed-off-by: Robin Getz <rgetz@mathworks.com>

channel.c

@@ -108,6 +108,12 @@ static const char * const modifier_names[] = {
 	[IIO_MOD_PM2P5] = "pm2p5",
 	[IIO_MOD_PM4] = "pm4",
 	[IIO_MOD_PM10] = "pm10",
+	[IIO_MOD_LINEAR_X] = "x-g",
+	[IIO_MOD_LINEAR_Y] = "y-g",
+	[IIO_MOD_LINEAR_Z] = "z-g",
+	[IIO_MOD_PITCH] = "pitch",
+	[IIO_MOD_YAW] = "yaw",
+	[IIO_MOD_ROLL] = "roll",
 };
 
 /*

iio.h

@@ -190,6 +190,12 @@ enum iio_modifier {
 	IIO_MOD_ETHANOL,
 	IIO_MOD_H2,
 	IIO_MOD_O2,
+	IIO_MOD_LINEAR_X,
+	IIO_MOD_LINEAR_Y,
+	IIO_MOD_LINEAR_Z,
+	IIO_MOD_PITCH,
+	IIO_MOD_YAW,
+	IIO_MOD_ROLL,
 };
 
 /**
@@ -206,6 +212,8 @@ enum iio_event_type {
 	IIO_EV_TYPE_THRESH_ADAPTIVE,
 	IIO_EV_TYPE_MAG_ADAPTIVE,
 	IIO_EV_TYPE_CHANGE,
+	IIO_EV_TYPE_MAG_REFERENCED,
+	IIO_EV_TYPE_GESTURE,
 };
 
 /**
@@ -219,6 +227,8 @@ enum iio_event_direction {
 	IIO_EV_DIR_RISING,
 	IIO_EV_DIR_FALLING,
 	IIO_EV_DIR_NONE,
+	IIO_EV_DIR_SINGLETAP,
+	IIO_EV_DIR_DOUBLETAP,
 };
 
 #endif /* _IIO_TYPES_H_ */