arm/dt: msm8974: Add smb350-charger to device tree

Add smb350-charger I2C device to BLSP#11.
pmic 8941 gpio#10 controls charger-enable (active low)
pmic 8941 gpio#13 controls charger-suspend (active low)
pmic 8941 gpio#30 reports charging status (active low)

Change-Id: I0522ba672110714693f1dbd3ef4cfe762a217901
Signed-off-by: Amir Samuelov <amirs@codeaurora.org>