Extend POST support for PPC440

Added memory, CPU, UART, I2C and SPR POST tests for PPC440.

Signed-off-by: Igor Lisitsin <igor@emcraft.com>
--
diff --git a/include/post.h b/include/post.h
index cdefbdd..8259e5d 100644
--- a/include/post.h
+++ b/include/post.h
@@ -91,6 +91,7 @@
 #define CFG_POST_SYSMON		0x00000800
 #define CFG_POST_DSP		0x00001000
 #define CFG_POST_CODEC		0x00002000
+#define CFG_POST_FPU		0x00004000
 
 #endif /* CONFIG_POST */