Witherspoon: Change hwmon GPU power labels

Match up the GPU power sensor labels with the temperature ones,
so they are both GPU0 through GPU5 instead of P0_GPU0 through
P1_GPU2.

Resolves openbmc/openbmc#3111

Change-Id: I509349049b8528415084e45c09200c16d2628a31
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
1 file changed