arm64: dts: qcom: msm8916-longcheer-l8910: Add front flash LED

l8910 uses OCP8110 flash LED driver. Add it to the device tree.

Tested-by: Stephan Gerhold <stephan@gerhold.net>
Signed-off-by: André Apitzsch <git@apitzsch.eu>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230514-x5_front_flash-v2-1-845a8bb0483b@apitzsch.eu