ppc4xx: Unify AMCC's board config files (part 3/3)

This patch series unifies the AMCC eval board ports by introducing
a common include header for all AMCC eval boards:

include/configs/amcc-common.h

This header now includes all common configuration options/defines which
are removed from the board specific headers.

The reason for this is ease of maintenance and unified look and feel
of all AMCC boards.

Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/board/amcc/sequoia/config.mk b/board/amcc/sequoia/config.mk
index e62b8d3..5e04ee4 100644
--- a/board/amcc/sequoia/config.mk
+++ b/board/amcc/sequoia/config.mk
@@ -28,6 +28,10 @@
 
 ifndef TEXT_BASE
 TEXT_BASE = 0xFFFA0000
+#
+# When defining CONFIG_VIDEO, TEXT_BASE needs to be 0xFFF80000
+# TEXT_BASE = 0xFFF80000
+#
 endif
 
 PLATFORM_CPPFLAGS += -DCONFIG_440=1