net/intel-ixl-kmod: Revert powerpc64 build patch

Revert r545792 and r545795

Reasons:

• The patches wasn't approved by the port maintainer
• Port driver version is different from the in-kernel one so the patch have to undergo proper QA process before being committed for the port
• No QA information provided with the patch for the port
• Patch is applied for all the architectures, not only affected one

Bump PORTREVISION to ensure that whoever installed the patched version
gets notified of the revert.

Sponsored by: Intel