leds: qpnp-wled: Fix the current sink configuration issue

The current sinks are not re-enabled in a corner case once they
are disabled during the sink parameter configuration. Fix it by
enabling them correctly.

Change-Id: I4ed03d6ebf4c42c3deb247447b28841ecc5312c8
Signed-off-by: Kiran Gunda <kgunda@codeaurora.org>