drm/amd/ras: Add unified ras module top-level makefile

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ifeq ($(AMD_GPU_RAS_MGR),)

	AMD_GPU_RAS_MGR := ras_mgr

endif

subdir-ccflags-y += -I$(AMD_GPU_RAS_FULL_PATH)/rascore

subdir-ccflags-y += -I$(AMD_GPU_RAS_FULL_PATH)/$(AMD_GPU_RAS_MGR)

RAS_LIBS = $(AMD_GPU_RAS_MGR) rascore

AMD_RAS = $(addsuffix /Makefile, $(addprefix $(AMD_GPU_RAS_FULL_PATH)/,$(RAS_LIBS)))

include $(AMD_RAS)