INTERNAL: arm64: dts: add LP5562 LED devices

Add LP5562 LED devices to Mistral device tree.
Add GPIO119 and blsp1_i2c1 device node in qcs404-mistral.dts.

BUG=b:116353073
TEST=Run on Mistral
echo 0 > /sys/bus/i2c/devices/0-0030/run_engine
echo RGB > /sys/bus/i2c/devices/0-0030/engine_mux
echo 255 > /sys/class/leds/LED0_Blue/brightness
Verify LED lights Blue.
echo 255 > /sys/class/leds/LED0_Red/brightness
Verify LED lights Purple.
echo 255 > /sys/class/leds/LED0_Green/brightness
Verify LED lights White.

Signed-off-by: Yuji Sasaki <sasakiy@chromium.org>
Change-Id: I06fc708aefbaca0ad794298b004613762fb82c2f
Reviewed-on: https://chromium-review.googlesource.com/1457425


Commit-Ready: Yuji Sasaki <sasakiy@chromium.org>
Tested-by: Yuji Sasaki <sasakiy@chromium.org>
Reviewed-by: Zhihong Yu <zhihongyu@chromium.org>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Khasim Syed Mohammed <khasim.mohammed@linaro.org>