rockchip: Add params_setup to RK3328.

params_setup.c provides the function params_early_setup, which
takes care of parsing ATF parameters (bl31_plat_param array,
fdt or coreboot table). As params_early_setup is defined as weak
symbol in bl31_plat_setup.c, providing a platform-specific
bl31_plat_setup implementation is optional.

This patch adds the rockchip-common params_setup.c to the sources
for RK3328. This streamlines the parameter handling for all supported
rockchip SoCs.

Signed-off-by: Christoph Müllner <christophm30@gmail.com>
Change-Id: I071c03106114364ad2fc408e49cc791fe5b35925

plat/rockchip/rk3328/platform.mk

@@ -40,6 +40,7 @@ BL31_SOURCES		+=	${RK_GIC_SOURCES}				\
 				lib/cpus/aarch64/cortex_a53.S			\
 				${RK_PLAT_COMMON}/drivers/parameter/ddr_parameter.c	\
 				${RK_PLAT_COMMON}/aarch64/plat_helpers.S	\
+				${RK_PLAT_COMMON}/params_setup.c		\
 				${RK_PLAT_COMMON}/bl31_plat_setup.c		\
 				${RK_PLAT_COMMON}/aarch64/pmu_sram_cpus_on.S	\
 				${RK_PLAT_COMMON}/plat_pm.c			\