sga: fix copypasta

Fix the name of the init function.
Reviewed-by: NAndreas Färber <afaerber@suse.de>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

hw/sga.c

@@ -35,7 +35,7 @@ typedef struct ISAGAState {
     ISADevice dev;
 } ISASGAState;
 
-static int isa_cirrus_vga_initfn(ISADevice *dev)
+static int sga_initfn(ISADevice *dev)
 {
     rom_add_vga(SGABIOS_FILENAME);
     return 0;
@@ -45,7 +45,7 @@ static ISADeviceInfo sga_info = {
     .qdev.name    = "sga",
     .qdev.desc    = "Serial Graphics Adapter",
     .qdev.size    = sizeof(ISASGAState),
-    .init         = isa_cirrus_vga_initfn,
+    .init         = sga_initfn,
 };
 
 static void sga_register(void)