[coreboot] [patch]: fixing a typo in rs780_gfx

[Bao, Zheng]

The code was ported. Now it is what it should be.

Signed-off-by: Zheng Bao

Index: src/southbridge/amd/rs780/rs780_gfx.c
===================================================================
--- src/southbridge/amd/rs780/rs780_gfx.c	(revision 5605)
+++ src/southbridge/amd/rs780/rs780_gfx.c	(working copy)
@@ -337,7 +337,7 @@
    value = nbmc_read_index(nb_dev, 0x10);
    *(GpuF0MMReg + 0x2000/4) = 0x11;
    *(GpuF0MMReg + 0x2180/4) =
((value&0xff00)>>8)|((value&0xff000000)>>8);
-	*(GpuF0MMReg + 0x2c04/4) = ((value&0xff0)<<8);
+	*(GpuF0MMReg + 0x2c04/4) = ((value&0xff00)<<8);
    *(GpuF0MMReg + 0x5428/4) =
((value&0xffff0000)+0x10000)-((value&0xffff)<<16);
    *(GpuF0MMReg + 0x2000/4) = 0x00000011;
    *(GpuF0MMReg + 0x200c/4) = 0x00000020;