leds: leds-qpnp: Changes for WLED work function called only once.

Remove the redundant and extra schedule_work() call during
wled initialization sequence as __qpnp_led_work() call just
before schedule_work() has already does the wled initialization.

CRs-Fixed: 554413
Change-Id: Ib206cb6b67db0d53ddeb285a28940abca7c9fe6e
Signed-off-by: Sarada Prasanna Garnayak <c_sgarna@codeaurora.org>