usb: chipidea: imx: remove unused header files

Those 2 headers files are not required now.
Signed-off-by: Jun Li <jun.li@nxp.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/chipidea/ci_hdrc_imx.c

@@ -7,10 +7,8 @@
 
 #include <linux/module.h>
 #include <linux/of_platform.h>
-#include <linux/of_gpio.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
-#include <linux/dma-mapping.h>
 #include <linux/usb/chipidea.h>
 #include <linux/usb/of.h>
 #include <linux/clk.h>