interconnect: imx: Replace inclusion of kernel.h in the header

The kernel.h is not used here directly, replace it with proper
set of headers.

Signed-off-by: Andy Shevchenko <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Georgi Djakov <[e-mail]>

drivers/interconnect/imx/imx.h

···
 #define __DRIVERS_INTERCONNECT_IMX_H
 
 #include <linux/args.h>
+#include <linux/bits.h>
+#include <linux/types.h>
+
 #include <linux/interconnect-provider.h>
-#include <linux/kernel.h>
+
+struct platform_device;
 
 #define IMX_ICC_MAX_LINKS	4