stv0991: increase the initial ram size config

It is done to make space available for driver model memory.
Signed-off-by: NVikas Manocha <vikas.manocha@st.com>

include/configs/stv0991.h

@@ -45,7 +45,7 @@
 
 /* MISC */
 #define CONFIG_SYS_LOAD_ADDR			0x00000000
-#define CONFIG_SYS_INIT_RAM_SIZE		0x2000
+#define CONFIG_SYS_INIT_RAM_SIZE		0x8000
 #define CONFIG_SYS_INIT_RAM_ADDR		0x00190000
 #define CONFIG_SYS_INIT_SP_OFFSET		\
 	(CONFIG_SYS_INIT_RAM_SIZE - GENERATED_GBL_DATA_SIZE)