platform/x86/amd/hsmp: fix building with CONFIG_HWMON=m

When CONFIG_HWMON is built as a loadable module, the HSMP drivers
cannot be built-in:

ERROR: modpost: "hsmp_create_sensor" [drivers/platform/x86/amd/hsmp/amd_hsmp.ko] undefined!
ERROR: modpost: "hsmp_create_sensor" [drivers/platform/x86/amd/hsmp/hsmp_acpi.ko] undefined!

Enforce that through the usual Kconfig dependnecy trick.

Fixes: 92c025d ("platform/x86/amd/hsmp: Report power via hwmon sensors")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20250522144422.2824083-1-arnd@kernel.org
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

Author: arndb

drivers/platform/x86/amd/hsmp/Kconfig

@@ -12,6 +12,7 @@ menu "AMD HSMP Driver"
 config AMD_HSMP_ACPI
 	tristate "AMD HSMP ACPI device driver"
 	depends on ACPI
+	depends on HWMON || !HWMON
 	select AMD_HSMP
 	help
 	  Host System Management Port (HSMP) interface is a mailbox interface
@@ -29,6 +30,7 @@ config AMD_HSMP_ACPI
 
 config AMD_HSMP_PLAT
 	tristate "AMD HSMP platform device driver"
+	depends on HWMON || !HWMON
 	select AMD_HSMP
 	help
 	  Host System Management Port (HSMP) interface is a mailbox interface