radeon_hd: Update southern islands info

* Add 7770 and 7750 pciid's
* Remove Thames and reorganize code names for SI
  (seems the codenames changed before release)
* Untested as always

headers/private/graphics/radeon_hd/radeon_hd.h

@@ -91,7 +91,8 @@ enum radeon_chipset {
 	RADEON_CAYMAN,
 	RADEON_ANTILLES,
 	RADEON_LOMBOK,		//Southern Islands, Radeon HD 7000
-	RADEON_THAMES,
+	RADEON_CAPEVERDE,
+	RADEON_PITCAIRN,
 	RADEON_TAHITI,
 	RADEON_NEWZEALAND
 };

src/add-ons/kernel/drivers/graphics/radeon_hd/driver.cpp

@@ -257,7 +257,10 @@ const struct supported_device {
 	// Introduced: Late 2011
 	// Codename: Southern Islands
 	//  Lombok
-	//  Thames
+	//  Cape Verde
+	{0x683F, 6, 0, RADEON_CAPEVERDE, CHIP_STD, "Radeon HD 7750"},
+	{0x683D, 6, 0, RADEON_CAPEVERDE, CHIP_STD, "Radeon HD 7770"},
+	//  Pitcairn
 	//  Tahiti
 	{0x679A, 6, 0, RADEON_TAHITI, CHIP_STD, "Radeon HD 7950"},
 	{0x6798, 6, 0, RADEON_TAHITI, CHIP_STD, "Radeon HD 7970"}

src/add-ons/kernel/drivers/graphics/radeon_hd/radeon_hd.cpp

@@ -38,6 +38,7 @@
 #define ERROR(x...) dprintf("radeon_hd: " x)
 
 
+// Must match chipset families in radeon_hd.h
 static const char radeon_chip_name[][16] = {
 	"R420",
 	"R423",
@@ -79,7 +80,8 @@ static const char radeon_chip_name[][16] = {
 	"Cayman",
 	"Antilles",
 	"Lombok",
-	"Thames",
+	"Cape Verde",
+	"Pitcairn",
 	"Tahiti",
 	"New Zealand"
 };