tpm: tpm_crb: constify acpi_device_id.

acpi_device_id are not supposed to change at runtime. All functions
working with acpi_device_id provided by <acpi/acpi_bus.h> work with
const acpi_device_id. So mark the non-const structs as const.

File size before:
text data bss dec hex filename
4198 608 0 4806 12c6 drivers/char/tpm/tpm_crb.o

File size After adding 'const':
text data bss dec hex filename
4262 520 0 4782 12ae drivers/char/tpm/tpm_crb.o

Signed-off-by: Arvind Yadav <[e-mail]>
Reviewed-by: Jarkko Sakkinen <[e-mail]>
Tested-by: Jarkko Sakkinen <[e-mail]>
Signed-off-by: Jarkko Sakkinen <[e-mail]>
Signed-off-by: James Morris <[e-mail]>

drivers/char/tpm/tpm_crb.c

···
 	SET_RUNTIME_PM_OPS(crb_pm_runtime_suspend, crb_pm_runtime_resume, NULL)
 };
 
-static struct acpi_device_id crb_device_ids[] = {
+static const struct acpi_device_id crb_device_ids[] = {
 	{"MSFT0101", 0},
 	{"", 0},
 };