ANDROID: gki_defconfig: remove CONFIG_ND_BLK

It was not used, and was removed in commit f8669f1d ("nvdimm/blk:
Delete the block-aperture window driver") so remove it from the
gki_defconfig files so the build works properly.

Fixes: f8669f1d ("nvdimm/blk: Delete the block-aperture window driver")
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ifedc35a228240bd042000cf1808b084fdb0a6c4b