meta-ibm: romulus: Update I2C hwmon paths for the 5.0 kernel

In the 5.0 Linux kernel, an I2C device path segment changed:
    i2c@1e78a000 -> bus@1e78a000

Tested: Verified paths visually, but not tested on hardware.
Change-Id: I13381a8a8513b1cdd47f10e9a2d71a7e1049dfb8
Signed-off-by: Patrick Venture <venture@google.com>
2 files changed