defconfig: Enabled conservative and interactive CPU governors

Since they're already coded into the kernel, why not just enable them for more choices? Adaptive governor is an exception, as it is causing all sorts of issues, including spontaneous reboots (esp. in recovery) due to hung task timeouts on basically any device that doesn't have it set to default.

Change-Id: I89fdd4d98985bbc85bfb9c3c6f3aa5a2367bea27
Signed-off-by: zwliew <zhaoweiliew@gmail.com>