phosphor-power: Fix pkg_postinst script

The pkg_postinst script uses the variable OBMC_POWER_SUPPLY_INSTANCES
that is not availabe during the post installation. This results in the
links of power-supply-monitor@.service are not created.

Use `@d.getVar()` to get the variable from bitbake fixed the issue.

Also removes the default OBMC_POWER_SUPPLY_INSTANCES, let the build fail
when OBMC_POWER_SUPPLY_INSTANCES is not defined. Otherwise such issues
are only found at runtime.

Tested: Verify the witherspoon build contains the
        power-supply-monitor@.service links;
        Unset OBMC_POWER_SUPPLY_INSTANCES, verify the build fails due to
        installation failure.

(From meta-phosphor rev: 2e6bda873f9c96c71da0103310f3e970d1a5b999)

Change-Id: Id70ea4c05b937bb93e7d93bcabf3a961cf295435
Signed-off-by: Lei YU <mine260309@gmail.com>
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>

0 files changed, 0 insertions, 0 deletions