rockchip: rk3368: spl: enable SPL_FRAMEWORK in rk3368_common.h

To build TPL and SPL stages for the RK3368, we will also need to
enable the SPL_FRAMEWORK.

Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

include/configs/rk3368_common.h

@@ -23,6 +23,7 @@
 
 #define COUNTER_FREQUENCY               24000000
 
+#define CONFIG_SPL_FRAMEWORK
 #define CONFIG_SYS_NS16550_MEM32
 
 #define CONFIG_SYS_TEXT_BASE		0x00200000