Revert "leds: leds-qpnp-flash: synchronize LED switch node operation"

This patch reverts 'commit c3f4946d ("leds: leds-qpnp-flash:
synchronize LED switch node operation")'

This was an incomplete fix which did not fix the synchronization issue
and also introduced a side-effect which caused switch node operations
to become a no-op.

CRs-Fixed: 1006961
Change-Id: Ibd4409595fa23a2dd3692385cc0932bbd3703d9f
Signed-off-by: Himanshu Aggarwal <haggarwa@codeaurora.org>