Intel Baytrail I2C semaphore support

configname: CONFIG_I2C_DESIGNWARE_BAYTRAIL

Linux Kernel Configuration
└─>Device Drivers
└─>I2C support
└─>I2C Hardware Bus support
└─>Intel Baytrail I2C semaphore support
In linux kernel since version 4 (release Date: 2015-04-12)  
This driver enables managed host access to the PMIC I2C bus on select
Intel BayTrail platforms using the X-Powers AXP288 PMIC. It allows
the host to request uninterrupted access to the PMIC's I2C bus from
the platform firmware controlling it. You should say Y if running on
a BayTrail system using the AXP288.