ocxl: do not use C++ style comments in uapi header

Linux kernel tolerates C++ style comments these days. Actually, the
SPDX License tags for .c files start with //.

On the other hand, uapi headers are written in more strict C, where
the C++ comment style is forbidden.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Frederic Barrat <fbarrat@linux.ibm.com>
Acked-by: Andrew Donnellan <ajd@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

include/uapi/misc/ocxl.h

@@ -33,23 +33,23 @@ struct ocxl_ioctl_attach {
 };
 
 struct ocxl_ioctl_metadata {
-	__u16 version; // struct version, always backwards compatible
+	__u16 version; /* struct version, always backwards compatible */
 
-	// Version 0 fields
+	/* Version 0 fields */
 	__u8  afu_version_major;
 	__u8  afu_version_minor;
-	__u32 pasid;		// PASID assigned to the current context
+	__u32 pasid;		/* PASID assigned to the current context */
 
-	__u64 pp_mmio_size;	// Per PASID MMIO size
+	__u64 pp_mmio_size;	/* Per PASID MMIO size */
 	__u64 global_mmio_size;
 
-	// End version 0 fields
+	/* End version 0 fields */
 
-	__u64 reserved[13]; // Total of 16*u64
+	__u64 reserved[13]; /* Total of 16*u64 */
 };
 
 struct ocxl_ioctl_p9_wait {
-	__u16 thread_id; // The thread ID required to wake this thread
+	__u16 thread_id; /* The thread ID required to wake this thread */
 	__u16 reserved1;
 	__u32 reserved2;
 	__u64 reserved3[3];