x86/intel/mpx: Remove unused LWP structure

We don't support LWP yet, don't give the impression that we do:
represent the LWP state as opaque 128 bytes, the way Linux sees it
currently.

Cc: Qiaowei Ren <qiaowei.ren@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/n/tip-ecarmjtfKpanpAapfck6dj6g@git.kernel.orgSigned-off-by: NIngo Molnar <mingo@kernel.org>

arch/x86/include/asm/processor.h

@@ -370,15 +370,9 @@ struct ymmh_struct {
 	u32 ymmh_space[64];
 };
 
+/* We don't support LWP yet: */
 struct lwp_struct {
-	u64 lwpcb_addr;
-	u32 flags;
-	u32 buf_head_offset;
-	u64 buf_base;
-	u32 buf_size;
-	u32 filters;
-	u64 saved_event_record[4];
-	u32 event_counter[16];
+	u8 reserved[128];
 };
 
 struct bndregs_struct {