Revert "vfp: compile with hardfloat"

This reverts commit a5fa4a8e02444813570ba3f16109afe2f06fc51b.
defconfig: remove some debugging
staging: inv_mpu: fix compile error
block: row: Fix crash when adding a new field in bio struct
When adding new field to struct bio there is a crash in the removed
code lines. This issue was introduced by commit
80a8f0f87bee18283e9ca0a8966ec97ad9f084e5 "block: row-iosched idling
triggered by readahead pages"

(Partly) reverting this patch till root cause is fixed (on FS level).

Change-Id: Ie82bc806ea52a6370b57aa15455c85b2db10d0da
Signed-off-by: Tanya Brokhman <tlinder@codeaurora.org>