spi: spi-pxa2xx: Do not define 'struct acpi_device_id' when !CONFIG_ACPI

Since ACPI_PTR() is used to NULLify the value when !CONFIG_ACPI,
struct 'pxa2xx_spi_acpi_match' becomes defined but unused.

Fixes the following W=1 kernel build warning(s):

 drivers/spi/spi-pxa2xx.c:1435:36: warning: ‘pxa2xx_spi_acpi_match’ defined but not used [-Wunused-const-variable=]
 1435 | static const struct acpi_device_id pxa2xx_spi_acpi_match[] = {
 | ^~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Lee Jones <[email protected]>
Cc: Daniel Mack <[email protected]>
Cc: Haojian Zhuang <[email protected]>
Cc: Robert Jarzmik <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>

Author: Lee Jones

drivers/spi/spi-pxa2xx.c

@@ -1432,6 +1432,7 @@ static void cleanup(struct spi_device *spi)
 	kfree(chip);
 }
 
+#ifdef CONFIG_ACPI
 static const struct acpi_device_id pxa2xx_spi_acpi_match[] = {
 	{ "INT33C0", LPSS_LPT_SSP },
 	{ "INT33C1", LPSS_LPT_SSP },
@@ -1442,6 +1443,7 @@ static const struct acpi_device_id pxa2xx_spi_acpi_match[] = {
 	{ },
 };
 MODULE_DEVICE_TABLE(acpi, pxa2xx_spi_acpi_match);
+#endif
 
 /*
  * PCI IDs of compound devices that integrate both host controller and private