defconfig: sdm855: Enable GPI dmaengine driver

Enable support for the QCOM GPI DMA controller. This controller
provides DMA capabilities for variety of peripheral buses such
as I2C, UART, and SPI.

CRs-Fixed: 2170554
Change-Id: Ic85706ed3b101c940c3cf48631914eb88e1854e1
Signed-off-by: Sujeev Dias <sdias@codeaurora.org>