Add support for the SST-49LF004C, SST-49LF008C, SST-49LF016C

Also add suport for NVIDIA MCP55.

Corresponding to flashrom svn r85 and coreboot v2 svn r2537.

Signed-off-by: Yinghai Lu <yinghai.lu@amd.com>
Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de>
Acked-by: Peter Stuge <peter@stuge.se>
diff --git a/flash.h b/flash.h
index 205cb60..6807f75 100644
--- a/flash.h
+++ b/flash.h
@@ -56,6 +56,9 @@
 #define SST_49LF003A	  0x1B	/* SST 49LF003A device */
 #define SST_49LF004A	  0x60	/* SST 49LF004A device */
 #define SST_49LF008A	  0x5A	/* SST 49LF008A device */
+#define SST_49LF004C	  0x54	/* SST 49LF004C device */
+#define SST_49LF008C	  0x59	/* SST 49LF008C device */
+#define SST_49LF016C	  0x5C	/* SST 49LF016C device */
 
 #define PMC_ID            0x9D	/* PMC Manufacturer ID code   */
 #define PMC_49FL002       0x6D	/* PMC 49FL002 device code      */