skiboot: Fix comment around OPAL_IMC_COUNTERS_ enum
skiboot: Fix comment around OPAL_IMC_COUNTERS_ enum

Fixes: 7801be0fcf2a2 ('skiboot: Add opal calls to init/start/stop IMC devices)
Signed-off-by: Madhavan Srinivasan <50c9fed97c2a760bbf32e7fdccf39ca6a997eabd@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <ec31ab75ddf977353c8f660f92ea8b23f64aef25@linux.vnet.ibm.com>

mikey/skiboot,open-power/skiboot,open-power/skiboot,qemu/skiboot,mikey/skiboot,shenki/skiboot,legoater/skiboot,stewart-ibm/skiboot,legoater/skiboot,legoater/skiboot,stewart-ibm/skiboot,legoater/skiboot,open-power/skiboot,stewart-ibm/skiboot,shenki/skiboot,shenki/skiboot,qemu/skiboot,legoater/skiboot,qemu/skiboot,open-power/skiboot,qemu/skiboot,open-power/skiboot,qemu/skiboot,shenki/skiboot,mikey/skiboot,shenki/skiboot