sensors: HAL: fix the bmp18x pressure sensor delay interface
sensors: HAL: fix the bmp18x pressure sensor delay interface

The sensor poll delay sysfs interface should be fixed to "poll_delay".

Change-Id: Icd5bbd81a4aa52e978d4fa2e7d3e9bba97594dd4

redmi2/android_hardware_qcom_sensors,TheStrix/platform-hardware-qcom-sensors,dianlujitao/platform_hardware_qcom_sensors,redmi2/android_hardware_qcom_sensors,dianlujitao/platform_hardware_qcom_sensors,TheStrix/platform-hardware-qcom-sensors