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Use R_WDOG to reset H6 SoCs; some of them have non-working WDOG blocks.

$NetBSD: patch-plat_allwinner_sun50i_h6_include_sunxi_mmap.h,v 1.1 2020/04/04 15:12:17 thorpej Exp $

Work around broken H6 WDOG reset.

--- plat/allwinner/sun50i_h6/include/sunxi_mmap.h.orig	2020-03-26 22:13:21.000000000 +0000
+++ plat/allwinner/sun50i_h6/include/sunxi_mmap.h
@@ -65,4 +65,8 @@
 #define SUNXI_R_UART_BASE		0x07080000
 #define SUNXI_R_PIO_BASE		0x07022000
 
+/* Work around broken H6 WDOG reset. */
+#undef SUNXI_WDOG_BASE
+#define SUNXI_WDOG_BASE			SUNXI_R_WDOG_BASE
+
 #endif /* __SUNXI_MMAP_H__ */