KVM: PPC: drop duplicate tracepoint

Commit 29577fc ("KVM: PPC: HV: Remove generic instruction emulation")
caused a build failure with allyesconfig:

arch/powerpc/kvm/kvm-pr.o:(__tracepoints+0xa8): multiple definition of `__tracepoint_kvm_ppc_instr'
arch/powerpc/kvm/kvm.o:(__tracepoints+0x1c0): first defined here

due to a duplicate definition of the tracepoint in trace.h and
trace_pr.h.  Because the tracepoint is still used by Book3S HV
code, and because the PR code does include trace.h, just remove
the duplicate definition from trace_pr.h, and export it from
kvm.o.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/powerpc/kvm/powerpc.c

@@ -1347,3 +1347,5 @@ void kvm_arch_exit(void)
 {
 
 }
+
+EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);

arch/powerpc/kvm/trace_pr.h

@@ -291,26 +291,6 @@ TRACE_EVENT(kvm_unmap_hva,
 	TP_printk("unmap hva 0x%lx\n", __entry->hva)
 );
 
-TRACE_EVENT(kvm_ppc_instr,
-	TP_PROTO(unsigned int inst, unsigned long _pc, unsigned int emulate),
-	TP_ARGS(inst, _pc, emulate),
-
-	TP_STRUCT__entry(
-		__field(	unsigned int,	inst		)
-		__field(	unsigned long,	pc		)
-		__field(	unsigned int,	emulate		)
-	),
-
-	TP_fast_assign(
-		__entry->inst		= inst;
-		__entry->pc		= _pc;
-		__entry->emulate	= emulate;
-	),
-
-	TP_printk("inst %u pc 0x%lx emulate %u\n",
-		  __entry->inst, __entry->pc, __entry->emulate)
-);
-
 #endif /* _TRACE_KVM_H */
 
 /* This part must be outside protection */