drm/xe: Allow dropping kunit dependency as built-in

Fix Kconfig symbol dependency on KUNIT, which isn't actually required
for XE to be built-in. However, if KUNIT is enabled, it must be built-in
too.

Fixes: 08987a8 ("drm/xe: Fix build with KUNIT=m")
Cc: Lucas De Marchi <[email protected]>
Cc: Thomas Hellström <[email protected]>
Cc: Jani Nikula <[email protected]>
Cc: Maarten Lankhorst <[email protected]>
Signed-off-by: Harry Austen <[email protected]>
Reviewed-by: Lucas De Marchi <[email protected]>
Acked-by: Randy Dunlap <[email protected]>
Tested-by: Randy Dunlap <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Lucas De Marchi <[email protected]>
(cherry picked from commit a559434)
Signed-off-by: Lucas De Marchi <[email protected]>

Author: Harry Austen

drivers/gpu/drm/xe/Kconfig

@@ -1,7 +1,8 @@
 # SPDX-License-Identifier: GPL-2.0-only
 config DRM_XE
 	tristate "Intel Xe2 Graphics"
-	depends on DRM && PCI && (m || (y && KUNIT=y))
+	depends on DRM && PCI
+	depends on KUNIT || !KUNIT
 	depends on INTEL_VSEC || !INTEL_VSEC
 	depends on X86_PLATFORM_DEVICES || !(X86 && ACPI)
 	select INTERVAL_TREE