ASoC: msm8x10: Configure the codec external clock drive strength

Whenever the codec external clock is enabled, configure the drive
strength on this clock before clock enable. This is to avoid possible
interference this clock can cause with other signals based on board
layout.

CRs-fixed: 551937
Change-Id: Ie45627424ce4f06dff96051ad18c55f4fb3279bc
Signed-off-by: Bhalchandra Gajare <gajare@codeaurora.org>