meta-phosphor: ipmi-config: set entity-map to empty by default

The file provided by default has no real meaning, just for example.
And this default file causes breakage in Get SDR commands.
Clearing out the provided entity-map entirely avoids the issue.

See: https://github.com/openbmc/phosphor-host-ipmid/blob/master/scripts/entity-example.md
for details on how it should be formatted.

Tested:
Run ipmitool sdr elist -vvv without errors
```
root@evb-npcm845:~# ipmitool sdr
Pwm_1            | 99.96 unspecifi   | ok
Pwm_2            | 99.96 unspecifi   | ok
Pwm_3            | 99.96 unspecifi   | ok
Pwm_4            | 99.96 unspecifi   | ok
Fan1             | 0 RPM             | cr
Fan2             | 0 RPM             | cr
Fan3             | 0 RPM             | cr
Fan4             | 0 RPM             | cr
EVB_Temp         | 34 degrees C      | ok
ADC1             | 1.26 Volts        | ok
ADC2             | 1.23 Volts        | ok
ADC3             | 1.23 Volts        | ok
ADC4             | 1.24 Volts        | ok
ADC5             | 1.24 Volts        | ok
ADC6             | 1.24 Volts        | ok
ADC7             | 1.24 Volts        | ok
ADC8             | 1.24 Volts        | ok
```

Signed-off-by: Tim Lee <timlee660101@gmail.com>
Change-Id: I69b9651ff36ecc0f0769b46fad94477d6f883786

0 files changed, 0 insertions, 0 deletions