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

we see sdhci cmd timedout errors on sdio slot which is
used by wlan driver on mdm9607.
Fix the issue by limiting clock rate from 200MHz to
100MHz.

Change-Id: Ibe13fa5e9a526ad68983f1a33607fbed4e76e1b3
Signed-off-by: Suresh Kumar Allam <allamsuresh@codeaurora.org>
Signed-off-by: Sivasri Kumar Vanka <sivasri@codeaurora.org>