SPL: Add support for loading image from ram in SPL.

Signed-off-by: Pavel Machek <pavel@denx.de>
Signed-off-by: Tom Rini <trini@ti.com>
diff --git a/README b/README
index c5e6a1a..a745d0b 100644
--- a/README
+++ b/README
@@ -2669,6 +2669,9 @@
 		CONFIG_SPL_SPI_SUPPORT
 		Support for drivers/spi/libspi.o in SPL binary
 
+		CONFIG_SPL_RAM_DEVICE
+		Support for running image already present in ram, in SPL binary
+
 		CONFIG_SPL_LIBGENERIC_SUPPORT
 		Support for lib/libgeneric.o in SPL binary