Revert "ARM: dts: qcom: limit sdhci clk rate to 100MHz for sdio"

sdhci cmd timedout error at 200MHz, on sdio slot is resolved
by adding wlan-QCA9377 quirks. Hence enable 200MHz clk rate.

This reverts commit 950ecffb.

Change-Id: Id6a57cebe247e9a260ab33ea25c8e4c19b455198
Signed-off-by: Suresh Kumar Allam <allamsuresh@codeaurora.org>