grunt: Add I2C support for the BMI160
We need to enable I2C_PORT_ACCEL so that the driver supports I2C
transfers.
BRANCH=none
TEST=On EC console:
> accelinit 1
> accelread 1
With this CL we avoid an error
#define I2C_PORT_TCPC1 NPCX_I2C_PORT2_0
#define I2C_PORT_THERMAL NPCX_I2C_PORT3_0
#define I2C_PORT_SENSOR NPCX_I2C_PORT7_0
+/* Accelerometer and Gyroscope are the same device. */
+#define I2C_PORT_ACCEL I2C_PORT_SENSOR
#define CONFIG_BRINGUP /* TODO(teravest): Remove this later. */
