omap-common: SPL: Add CONFIG_SPL_DISPLAY_PRINT / spl_display_print()

Only omap4/5 currently have a meaningful set of display text and overo
had been adding a function to display nothing.  Change how this works to
be opt-in and only turned on for omap4/5 now.

Signed-off-by: Tom Rini <trini@ti.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/README b/README
index 5793b0a206..309d88dce4 100644
--- a/README
+++ b/README
@@ -2597,6 +2597,10 @@ FIT uImage format:
                 CONFIG_SYS_SPL_MALLOC_SIZE
                 The size of the malloc pool used in SPL.
 
+                CONFIG_SPL_DISPLAY_PRINT
+                For ARM, enable an optional function to print more information
+                about the running system.
+
                 CONFIG_SPL_LIBCOMMON_SUPPORT
                 Support for common/libcommon.o in SPL binary