leds: leds-qpnp-flash: fix torch 1 reference in driver

Torch1 control in LED enablement call path was broken due to a
wrong dereference. That leads to incorrect brightness value written
into register and cause malfunction.

Change-Id: Id51671f61e8b3988f95c423c48d1e720eab514a9
Signed-off-by: Chun Zhang <chunz@codeaurora.org>