arm: vt8500: Add support for Wondermedia WM8750/WM8850

This patch adds support for the WM8750 (ARMv6) and WM8850 (ARMv7).
Devicetree documentation is updated for new SoCs.

Signed-off-by: Tony Prisk <linux@prisktech.co.nz>
diff --git a/arch/arm/mach-vt8500/vt8500.c b/arch/arm/mach-vt8500/vt8500.c
index 3c66d48..55162ab 100644
--- a/arch/arm/mach-vt8500/vt8500.c
+++ b/arch/arm/mach-vt8500/vt8500.c
@@ -183,6 +183,8 @@
 	"via,vt8500",
 	"wm,wm8650",
 	"wm,wm8505",
+	"wm,wm8750",
+	"wm,wm8850",
 };
 
 DT_MACHINE_START(WMT_DT, "VIA/Wondermedia SoC (Device Tree Support)")