defconfig: msm8226: Enable early printk support for msm8226

Enabling this option to get kernel logs earlier which is useful
to debug early bootup failures.

CRs-Fixed: 501362
Change-Id: I53f01949b3fef07a4d7969c5ccbd3b7271d15037
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>