Revert "gpiolib: Fix GPIO chip IRQ initialization restriction"

This reverts commit 497d4014 which is
commit 8c00914e upstream.

It breaks the Android api, so revert it for now.  If it needs to come
back, it can do so in an abi-safe way.

Bug: 161946584
Change-Id: Ic6c0f3eda15a05d292fa047430a900682505fa64
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>