Revert "net: macsec: indicate next pn update when offloading"

This reverts commit a848ae8b which is
commit 0412cc84 upstream.

It breaks the android ABI and if this is needed in the future, can be
brought back in an abi-safe way.

Bug: 161946584
Change-Id: I672a836a2cb6ab55245df6800b01332cf1e9c8e6
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>