Revert "driver core: bus: add irq_get_affinity callback to bus_type"

This reverts commit 5ec90397 which is
commit fea4952d upstream.

It breaks the Android kernel abi and can be brought back in the future
in an abi-safe way if it is really needed.

Bug: 161946584
Change-Id: I8aadae6678e8150b15810d66c1904daa7b84b82c
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>