ARC: dma: reintroduce platform specific dma<->phys

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index 8ce09280..5c086d5 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -468,6 +468,9 @@
 config ARCH_DMA_ADDR_T_64BIT
 	bool
 
+config ARC_PLAT_NEEDS_PHYS_TO_DMA
+	bool
+
 config ARC_CURR_IN_REG
 	bool "Dedicate Register r25 for current_task pointer"
 	default y