Change yield from ptr to object

The ptr makes for ugly code:
i.e. *(ctx->yield) all over the place.

Change it to copy as it is just 4 pointers.

Tested: ipmitool mc info still works

Change-Id: I30c5bc395849875cd58925fac99bb23c1804cd5b
Signed-off-by: James Feist <james.feist@linux.intel.com>
3 files changed