Add SST49LF020 support

Corresponding to flashrom svn r373 and coreboot v2 svn r3850.
Signed-off-by: Sven Schnelle <svens@stackframe.org>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>

flash.h

@@ -356,6 +356,7 @@ extern struct flashchip flashchips[];
 #define SST_39VF040		0xD7
 #define SST_49LF040B		0x50
 #define SST_49LF040		0x51
+#define SST_49LF020		0x61
 #define SST_49LF020A		0x52
 #define SST_49LF080A		0x5B
 #define SST_49LF002A		0x57

flashchips.c

@@ -626,6 +626,12 @@ struct flashchip flashchips[] = {
 	 probe_49lfxxxc, erase_49lfxxxc, write_49lfxxxc
 	},
 
+	{"SST", "SST49LF020", SST_ID, SST_49LF020,
+	 256, 16 * 1024,
+	 TEST_OK_PR,
+	 probe_jedec, erase_49lf040, write_49lf040
+	},
+
 	{"SST", "SST49LF020A", SST_ID, SST_49LF020A,
 	 256, 16 * 1024,
 	 TEST_UNTESTED,