iio: st_sensors: drop ACPI_PTR() and CONFIG_ACPI guards

The complexity of config guards needed for ACPI_PTR() is not worthwhile
for the small amount of saved data. This example was doing it correctly
but I am proposing dropping this so as to reduce chance of cut and paste
where it is done wrong. Also drop now unneeded linux/acpi.h include.

Cc: Linus Walleij <[e-mail]>
Cc: Denis CIOCCA <[e-mail]>
Reviewed-by: Andy Shevchenko <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jonathan Cameron <[e-mail]>

drivers/iio/accel/st_accel_i2c.c

···
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/mod_devicetable.h>
-#include <linux/acpi.h>
 #include <linux/i2c.h>
 #include <linux/iio/iio.h>
 
···
 };
 MODULE_DEVICE_TABLE(of, st_accel_of_match);
 
-#ifdef CONFIG_ACPI
 static const struct acpi_device_id st_accel_acpi_match[] = {
 	{"SMO8840", (kernel_ulong_t)LIS2DH12_ACCEL_DEV_NAME},
 	{"SMO8A90", (kernel_ulong_t)LNG2DM_ACCEL_DEV_NAME},
 	{ },
 };
 MODULE_DEVICE_TABLE(acpi, st_accel_acpi_match);
-#endif
 
 static const struct i2c_device_id st_accel_id_table[] = {
 	{ LSM303DLH_ACCEL_DEV_NAME },
···
 	.driver = {
 		.name = "st-accel-i2c",
 		.of_match_table = st_accel_of_match,
-		.acpi_match_table = ACPI_PTR(st_accel_acpi_match),
+		.acpi_match_table = st_accel_acpi_match,
 	},
 	.probe = st_accel_i2c_probe,
 	.id_table = st_accel_id_table,

drivers/iio/pressure/st_pressure_i2c.c

···
  * Denis Ciocca <[e-mail]>
  */
 
-#include <linux/acpi.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/mod_devicetable.h>
···
 };
 MODULE_DEVICE_TABLE(of, st_press_of_match);
 
-#ifdef CONFIG_ACPI
 static const struct acpi_device_id st_press_acpi_match[] = {
 	{"SNO9210", LPS22HB},
 	{ },
 };
 MODULE_DEVICE_TABLE(acpi, st_press_acpi_match);
-#endif
 
 static const struct i2c_device_id st_press_id_table[] = {
 	{ LPS001WP_PRESS_DEV_NAME, LPS001WP },
···
 	.driver = {
 		.name = "st-press-i2c",
 		.of_match_table = st_press_of_match,
-		.acpi_match_table = ACPI_PTR(st_press_acpi_match),
+		.acpi_match_table = st_press_acpi_match,
 	},
 	.probe = st_press_i2c_probe,
 	.id_table = st_press_id_table,