leds: qpnp-wled: Disable module permanently when OVP fault persists

leds: qpnp-wled: Disable module permanently when OVP fault persists

Currently, auto calibration will be invoked if an OVP fault is
triggered because of an incorrect sink configuration. However,
there are certain hardware platforms where the display panel is
not used. It is hard to differentiate such platforms as they
will be using the same device tree configuration or parameters
related to display panel passed through the bootloader.

Disable the module permanently and also keep the OVP fault
interrupt disabled when a valid sink configuration is not found
by auto calibration.

Change-Id: I302322020e8d6d4f92901dac468602c357967e18
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>