ARM: sunxi: Introduce Allwinner A23 support

The Allwinner A23 is a dual-core Cortex-A7-based SoC. It re-uses most of
the IPs found in previous SoCs, notably the A31.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

arch/arm/mach-sunxi/Kconfig

@@ -35,4 +35,9 @@ config MACH_SUN7I
 	select HAVE_ARM_ARCH_TIMER
 	select SUN5I_HSTIMER
 
+config MACH_SUN8I
+	bool "Allwinner A23 (sun8i) SoCs support"
+	default ARCH_SUNXI
+	select ARM_GIC
+
 endif

arch/arm/mach-sunxi/sunxi.c

@@ -53,3 +53,12 @@ static const char * const sun7i_board_dt_compat[] = {
 DT_MACHINE_START(SUN7I_DT, "Allwinner sun7i (A20) Family")
 	.dt_compat	= sun7i_board_dt_compat,
 MACHINE_END
+
+static const char * const sun8i_board_dt_compat[] = {
+	"allwinner,sun8i-a23",
+	NULL,
+};
+
+DT_MACHINE_START(SUN8I_DT, "Allwinner sun8i (A23) Family")
+	.dt_compat	= sun8i_board_dt_compat,
+MACHINE_END