Input: ili210x - fix ili251x_read_touch_data() return value

The caller of this function treats all non-zero values as an error, so
the return value of i2c_master_recv() cannot be returned directly.

This fixes touch reporting when there are more than 6 active touches.

Fixes: ef536ab ("Input: ili210x - define and use chip operations structure")
Signed-off-by: John Keeping <jkeeping@inmusicbrands.com>
Link: https://lore.kernel.org/r/20240523085624.2295988-1-jkeeping@inmusicbrands.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/touchscreen/ili210x.c

@@ -261,8 +261,8 @@ static int ili251x_read_touch_data(struct i2c_client *client, u8 *data)
  if (!error && data[0] == 2) {
  error = i2c_master_recv(client, data + ILI251X_DATA_SIZE1,
  ILI251X_DATA_SIZE2);
- if (error >= 0 && error != ILI251X_DATA_SIZE2)
- error = -EIO;
+ if (error >= 0)
+ error = error == ILI251X_DATA_SIZE2 ? 0 : -EIO;
  }
 
  return error;