Add support for SIS661 (SIS963)

Tested on Asus P4S800-MX.

Corresponding to flashrom svn r1128.
Signed-off-by: David Borg <borg.db@gmail.com>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>

chipset_enable.c

@@ -1116,6 +1116,7 @@ const struct penable chipset_enables[] = {
 	{0x1039, 0x0650, NT, "SiS", "650",		enable_flash_sis540},
 	{0x1039, 0x0651, NT, "SiS", "651",		enable_flash_sis540},
 	{0x1039, 0x0655, NT, "SiS", "655",		enable_flash_sis540},
+	{0x1039, 0x0661, OK, "SiS", "661",		enable_flash_sis540},
 	{0x1039, 0x0730, NT, "SiS", "730",		enable_flash_sis540},
 	{0x1039, 0x0733, NT, "SiS", "733",		enable_flash_sis540},
 	{0x1039, 0x0735, OK, "SiS", "735",		enable_flash_sis540},