arm/dt: msmcopper: Add TLMM/GPIO support for SDC slots

SDC1 and SDC2 interfaces on copper target has dedicated
TLMM pins and SDC3, SDC4 have GPIOs muxed with other
subsystems.

Change-Id: I6f924ccb0c27e8ecde95c0a7d8beb6614c25378d
Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org>