[PATCH] perf tools: Add missing case value

[Solomon Tan]

This patch fixes the following error message during compilation of 
`tools/perf`, as seen in https://github.com/Linaro/OpenCSD/issues/17.

```
  CC       util/intel-pt-decoder/intel-pt-log.o
  CC       util/cs-etm-decoder/cs-etm-decoder.o
util/cs-etm-decoder/cs-etm-decoder.c: In function 
‘cs_etm_decoder__buffer_range’:
util/cs-etm-decoder/cs-etm-decoder.c:370:2: error: enumeration value 
‘OCSD_INSTR_WFI_WFE’ not handled in switch [-Werror=switch-enum]
  switch (elem->last_i_type) {
  ^~~~~~
  CC       util/intel-pt-decoder/intel-pt-decoder.o
cc1: all warnings being treated as errors
```

Signed-off-by: solomon-ubuntu <solomonbsto...@protonmail.ch>
---
 tools/perf/util/cs-etm-decoder/cs-etm-decoder.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c 
b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c
index 8c155575c6c5..2a8bf6b45a30 100644
--- a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c
+++ b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c
@@ -374,6 +374,7 @@ cs_etm_decoder__buffer_range(struct cs_etm_decoder *decoder,
                break;
        case OCSD_INSTR_ISB:
        case OCSD_INSTR_DSB_DMB:
+       case OCSD_INSTR_WFI_WFE:
        case OCSD_INSTR_OTHER:
        default:
                packet->last_instr_taken_branch = false;
-- 

2.17.1

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