Enable flashrom on Wyse Winterm S50

On the Wyse Winterm S50 lspci doesn`t show the cs5536 hostbridge and so 
flashrom doesn`t detect the cs5536.

This patch is adding the cs5536 isa id [1022:2090] for chip detect.

Corresponding to flashrom svn r729.
Signed-off-by: Nils Jacobs <njacobs8@hetnet.nl>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>

chipset_enable.c

@@ -972,6 +972,7 @@ const struct penable chipset_enables[] = {
 	{0x1022, 0x7468, OK, "AMD", "AMD8111",		enable_flash_amd8111},
 	{0x1078, 0x0100, OK, "AMD", "CS5530(A)",	enable_flash_cs5530},
 	{0x1022, 0x2080, OK, "AMD", "CS5536",		enable_flash_cs5536},
+	{0x1022, 0x2090, OK, "AMD", "CS5536",		enable_flash_cs5536},
 	{0x1022, 0x3000, OK, "AMD", "Elan SC520",	get_flashbase_sc520},
 	{0x1002, 0x438D, OK, "AMD", "SB600",		enable_flash_sb600},
 	{0x1002, 0x439d, OK, "AMD", "SB700/SB710/SB750", enable_flash_sb600},