build: pkg anti-pattern: use defaults
build: pkg anti-pattern: use defaults

Use the defaults in the pkg check where the default error message is
sufficient to identify which package is missing.

Change-Id: Iad7753b8e6a80307ad57a9a6dd2d442ec7fe0e67
Signed-off-by: Patrick Venture <36c53fa43f47f3fd67cb2fc38031827244d18a1f@google.com>

openbmc/phosphor-hwmon,openbmc/phosphor-hwmon