sunxi: Add TPR2 parameter for H616 DRAM driver

It turns out that some H616 and related SoCs (like H313) need TPR2
parameter for proper working. Add it.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig
index fe34755..6be8a4d 100644
--- a/arch/arm/mach-sunxi/Kconfig
+++ b/arch/arm/mach-sunxi/Kconfig
@@ -79,6 +79,12 @@
 	help
 	  TPR0 value from vendor DRAM settings.
 
+config DRAM_SUN50I_H616_TPR2
+	hex "H616 DRAM TPR2 parameter"
+	default 0x0
+	help
+	  TPR2 value from vendor DRAM settings.
+
 config DRAM_SUN50I_H616_TPR10
 	hex "H616 DRAM TPR10 parameter"
 	help