gpio: pca9570: Don't use "proxy" headers

Update header inclusions to follow IWYU (Include What You Use)
principle.

Note that kernel.h is discouraged to be included as it's written
at the top of that file.

Reviewed-by: Linus Walleij <linusw@kernel.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20260113111156.188051-3-andriy.shevchenko@linux.intel.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>

Author: andy-shev

drivers/gpio/gpio-pca9570.c

@@ -9,11 +9,15 @@
  *	Andrew F. Davis <afd@ti.com>
  */
 
+#include <linux/bits.h>
+#include <linux/device/devres.h>
+#include <linux/errno.h>
 #include <linux/gpio/driver.h>
 #include <linux/i2c.h>
 #include <linux/module.h>
 #include <linux/mutex.h>
 #include <linux/property.h>
+#include <linux/types.h>
 
 #define SLG7XL45106_GPO_REG	0xDB