Add VIA CX700 to the list of supported southbridges

Corresponding to flashrom svn r102 and coreboot v2 svn r2601.
Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>

README

@@ -148,6 +148,7 @@ NVIDIA MCP51
 NVIDIA MCP55
 SiS 630
 SiS 5595
+VIA CX700
 VIA VT8231
 VIA VT8235
 VIA VT8237