meta-ibm: romulus: rename phosphor-hwmon

Rename phosphor-hwmon%.bbappend to phosphor-hwmon_%.bbappend.

Tested: Built romulus and verified hwmon confs were in rootfs.
Change-Id: Iff7f321bbff86b8db08364ddc1a938a8e201a849
Signed-off-by: Patrick Venture <venture@google.com>
6 files changed