ACPI / APD: constify local structures

For structure types defined in the same file or local header files, find
top-level static structure declarations that have the following
properties:
1. Never reassigned.
2. Address never taken
3. Not passed to a top-level macro call
4. No pointer or array-typed field passed to a function or stored in a
variable.
Declare structures having all of these properties as const.

Done using Coccinelle.
Based on a suggestion by Joe Perches <joe@perches.com>.
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/acpi_apd.c

@@ -72,7 +72,7 @@ static int acpi_apd_setup(struct apd_private_data *pdata)
 }
 
 #ifdef CONFIG_X86_AMD_PLATFORM_DEVICE
-static struct apd_device_desc cz_i2c_desc = {
+static const struct apd_device_desc cz_i2c_desc = {
 	.setup = acpi_apd_setup,
 	.fixed_clk_rate = 133000000,
 };
@@ -84,7 +84,7 @@ static struct property_entry uart_properties[] = {
 	{ },
 };
 
-static struct apd_device_desc cz_uart_desc = {
+static const struct apd_device_desc cz_uart_desc = {
 	.setup = acpi_apd_setup,
 	.fixed_clk_rate = 48000000,
 	.properties = uart_properties,
@@ -92,12 +92,12 @@ static struct apd_device_desc cz_uart_desc = {
 #endif
 
 #ifdef CONFIG_ARM64
-static struct apd_device_desc xgene_i2c_desc = {
+static const struct apd_device_desc xgene_i2c_desc = {
 	.setup = acpi_apd_setup,
 	.fixed_clk_rate = 100000000,
 };
 
-static struct apd_device_desc vulcan_spi_desc = {
+static const struct apd_device_desc vulcan_spi_desc = {
 	.setup = acpi_apd_setup,
 	.fixed_clk_rate = 133000000,
 };