platform/x86/amd/hsmp: Use IS_ENABLED() instead of IS_REACHABLE()

JIRA: https://issues.redhat.com/browse/RHEL-102859

commit e7c1a9e
Author: Suma Hegde <suma.hegde@amd.com>
Date:   Tue Jun 3 05:58:07 2025 +0000

    platform/x86/amd/hsmp: Use IS_ENABLED() instead of IS_REACHABLE()

    IS_REACHABLE() was required when CONFIG_HWMON was set to m and HSMP to y.
    However, commit 69157b0 ("platform/x86/amd/hsmp: fix building with
    CONFIG_HWMON=m") added a HWMON dependency for HSMP in Kconfig. With
    this change, using IS_ENABLED() is sufficient.

    Add the missing header file as well.

    Signed-off-by: Suma Hegde <suma.hegde@amd.com>
    Link: https://lore.kernel.org/r/20250603055807.2503028-1-suma.hegde@amd.com
    Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
    Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

Signed-off-by: David Arcari <darcari@redhat.com>

Author: darcari

drivers/platform/x86/amd/hsmp/hsmp.h

@@ -13,6 +13,7 @@
 #include <linux/compiler_types.h>
 #include <linux/device.h>
 #include <linux/hwmon.h>
+#include <linux/kconfig.h>
 #include <linux/miscdevice.h>
 #include <linux/pci.h>
 #include <linux/semaphore.h>
@@ -64,7 +65,7 @@ int hsmp_misc_register(struct device *dev);
 int hsmp_get_tbl_dram_base(u16 sock_ind);
 ssize_t hsmp_metric_tbl_read(struct hsmp_socket *sock, char *buf, size_t size);
 struct hsmp_plat_device *get_hsmp_pdev(void);
-#if IS_REACHABLE(CONFIG_HWMON)
+#if IS_ENABLED(CONFIG_HWMON)
 int hsmp_create_sensor(struct device *dev, u16 sock_ind);
 #else
 static inline int hsmp_create_sensor(struct device *dev, u16 sock_ind) { return 0; }