i2c: mux: gpio: move header to platform_data

This header only contains platform_data. Move it to the proper directory.

Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Acked-by: Peter Korsgaard <peter.korsgaard@barco.com>

drivers/i2c/busses/i2c-i801.c

@@ -106,7 +106,7 @@
 
 #if IS_ENABLED(CONFIG_I2C_MUX_GPIO) && defined CONFIG_DMI
 #include <linux/gpio.h>
-#include <linux/i2c-mux-gpio.h>
+#include <linux/platform_data/i2c-mux-gpio.h>
 #endif
 
 /* I801 SMBus address offsets */