msm: Add configuration required to use GSBI8 into UARTDM Mode

Add GSBI8 device and its related interfaces with their configuration
i.e. clock, ADM, GPIO. GSBI8 UARTDM interface can be used for external
Bluetooth SoC.

CRs-Fixed: 375285
Change-Id: I15819862072c92d8ff6f397fdf081f1b619ec235
Signed-off-by: Mayank Rana <mrana@codeaurora.org>