Fix PL110 framebuffer byteswapping in 32bpp mode.

Signed-off-by: Paul Brook <paul@codesourcery.com>
diff --git a/hw/pl110_template.h b/hw/pl110_template.h
index 5b5f475..d7ff8bc 100644
--- a/hw/pl110_template.h
+++ b/hw/pl110_template.h
@@ -282,7 +282,7 @@
 #define LSB b
 #define MSB r
 #endif
-#ifdef SWAP_WORDS
+#ifndef SWAP_WORDS
         LSB = data & 0xff;
         g = (data >> 8) & 0xff;
         MSB = (data >> 16) & 0xff;