arm64: dts: Add SPI/PDMA dt node for exynos5433

arm64: dts: Add SPI/PDMA dt node for exynos5433

This patch adds SPI (Serial Peripheral Interface) dt node for Exynos5433
SoC. SPI transfers serial data by using various peripherals. SPI includes
8-bit/16-bit/32-bit shift registers to transmit and receive data. PDMA is
used for SPI communication.

Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Olof Johansson <olof@lixom.net>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>