iio: imu: st_lsm6dsx: Remove unnecessary cast on void pointer

The following Coccinelle script was used to detect this:
@r@
expression x;
void* e;
type T;
identifier f;
@@
(
  *((T *)e)
|
  ((T *)x)[...]
|
  ((T*)x)->f
|
- (T*)
  e
)

Signed-off-by: simran singhal <singhalsimran0@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c

@@ -364,7 +364,7 @@ static int st_lsm6dsx_update_fifo(struct iio_dev *iio_dev, bool enable)
 
 static irqreturn_t st_lsm6dsx_handler_irq(int irq, void *private)
 {
-	struct st_lsm6dsx_hw *hw = (struct st_lsm6dsx_hw *)private;
+	struct st_lsm6dsx_hw *hw = private;
 	struct st_lsm6dsx_sensor *sensor;
 	int i;
 
@@ -388,7 +388,7 @@ static irqreturn_t st_lsm6dsx_handler_irq(int irq, void *private)
 
 static irqreturn_t st_lsm6dsx_handler_thread(int irq, void *private)
 {
-	struct st_lsm6dsx_hw *hw = (struct st_lsm6dsx_hw *)private;
+	struct st_lsm6dsx_hw *hw = private;
 	int count;
 
 	mutex_lock(&hw->fifo_lock);