drm/panthor: Fix wrong kernel-doc format in the uAPI header

The kernel doc prefix is /** not /*.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Acked-by: Liviu Dudau <liviu.dudau@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240326093055.411932-1-boris.brezillon@collabora.com

include/uapi/drm/panthor_drm.h

@@ -336,10 +336,10 @@ struct drm_panthor_gpu_info {
 	/** @tiler_present: Bitmask encoding the tiler units exposed by the GPU. */
 	__u64 tiler_present;
 
-	/* @core_features: Used to discriminate core variants when they exist. */
+	/** @core_features: Used to discriminate core variants when they exist. */
 	__u32 core_features;
 
-	/* @pad: MBZ. */
+	/** @pad: MBZ. */
 	__u32 pad;
 };