defconfig: Updated defconfig

Change-Id: I474afb93d3cb4ee884fea89602d3c48dca027744
Signed-off-by: zwliew <zhaoweiliew@gmail.com>
defconfig: Made ROW the default I/O scheduler

Change-Id: I0dc5716c543a305e20b13e401d69c21fc96e85a0
Signed-off-by: zwliew <zhaoweiliew@gmail.com>