ARM: dts: msm: Enable cnss-sdio node for dual-wifi in mdmcalifornium

Enable cnss sdio node for dual-wifi platforms and add the optional
property "qcom,is-dual-wifi-enabled" to control pcie wlan-en gpio.

Change-Id: Ie498ce6540d55dac1ea8e5b59e2d898b30fd59d1
Signed-off-by: Komal Kumar <kseelam@codeaurora.org>
CRs-Fixed: 990796