USB: dwc3-msm: Notify suspend/resume events to composite layer

Drawing 500mA current during suspend could cause USB complaince
tests fail. Hence notify charger driver to draw suspend current
of 2mA when Host suspends the device. Also notify charger driver
to draw configured current during resume.

Change debugfs variable type from bool to u32 to prevent memory
corruption.

Change-Id: Ia7fb493fa89686b6164cb7e0803721b0ac00125f
Signed-off-by: Vijayavardhan Vennapusa <vvreddy@codeaurora.org>