i2c: designware: Discard i2c_dw_read_comp_param() function

There is no code left in the kernel which would be using the function.
So just remove it.

Signed-off-by: Serge Semin <[e-mail]>
Signed-off-by: Alexey Malahov <[e-mail]>
Acked-by: Jarkko Nikula <[e-mail]>
Signed-off-by: Wolfram Sang <[e-mail]>

drivers/i2c/busses/i2c-designware-common.c

···
 	dw_writel(dev, 0, DW_IC_INTR_MASK);
 }
 
-u32 i2c_dw_read_comp_param(struct dw_i2c_dev *dev)
-{
-	return dw_readl(dev, DW_IC_COMP_PARAM_1);
-}
-EXPORT_SYMBOL_GPL(i2c_dw_read_comp_param);
-
 MODULE_DESCRIPTION("Synopsys DesignWare I2C bus adapter core");
 MODULE_LICENSE("GPL");

drivers/i2c/busses/i2c-designware-core.h

···
 
 void __i2c_dw_disable(struct dw_i2c_dev *dev);
 
-extern u32 i2c_dw_read_comp_param(struct dw_i2c_dev *dev);
 extern int i2c_dw_probe(struct dw_i2c_dev *dev);
 #if IS_ENABLED(CONFIG_I2C_DESIGNWARE_SLAVE)
 extern int i2c_dw_probe_slave(struct dw_i2c_dev *dev);