crypto: qat - refactor included headers

Include kernel.h for GENMASK(), kstrtobool() and types.

Add forward declaration for struct adf_accel_dev. Remove unneeded
include.

This change doesn't introduce any function change.
Signed-off-by: Lucas Segarra Fernandez <lucas.segarra.fernandez@intel.com>
Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/intel/qat/qat_common/adf_gen4_pm.c

@@ -2,6 +2,8 @@
 /* Copyright(c) 2022 Intel Corporation */
 #include <linux/bitfield.h>
 #include <linux/iopoll.h>
+#include <linux/kernel.h>
+
 #include "adf_accel_devices.h"
 #include "adf_common_drv.h"
 #include "adf_gen4_pm.h"

drivers/crypto/intel/qat/qat_common/adf_gen4_pm.h

@@ -3,7 +3,9 @@
 #ifndef ADF_GEN4_PM_H
 #define ADF_GEN4_PM_H
 
-#include "adf_accel_devices.h"
+#include <linux/bits.h>
+
+struct adf_accel_dev;
 
 /* Power management registers */
 #define ADF_GEN4_PM_HOST_MSG (0x50A01C)