platform/x86/intel/pmt: fix build dependency for kunit test

When INTEL_PMT_TELEMETRY is in a loadable module, the discovery
test cannot be built-in:

x86_64-linux-ld: drivers/platform/x86/intel/pmt/discovery-kunit.o: in function `test_intel_pmt_get_regions_by_feature':
discovery-kunit.c:(.text+0x29d): undefined reference to `intel_pmt_get_regions_by_feature'
x86_64-linux-ld: discovery-kunit.c:(.text+0x2c3): undefined reference to `intel_pmt_put_feature_group'

Add a Kconfig dependency to prevent this.

Fixes: b9707d4 ("platform/x86/intel/pmt: KUNIT test for PMT Enhanced Discovery API")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20250714081559.4056777-1-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/intel/pmt/Kconfig

@@ -55,6 +55,7 @@ config INTEL_PMT_DISCOVERY
 config INTEL_PMT_KUNIT_TEST
 	tristate "KUnit tests for Intel PMT driver"
 	depends on INTEL_PMT_DISCOVERY
+	depends on INTEL_PMT_TELEMETRY || !INTEL_PMT_TELEMETRY
 	depends on KUNIT
 	help
 	  Enable this option to compile and run a suite of KUnit tests for the Intel