arm: socfpga: spl: Adjust the SYS_INIT_RAM_SIZE to have room for the spl malloc

We need to adjust the SYS_INIT_RAM_SIZE to have room for the
SPL_MALLOC_SIZE.

Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>

include/configs/socfpga_common.h

@@ -40,7 +40,7 @@
 #define CONFIG_SYS_MEMTEST_END		PHYS_SDRAM_1_SIZE
 
 #define CONFIG_SYS_INIT_RAM_ADDR	0xFFFF0000
-#define CONFIG_SYS_INIT_RAM_SIZE	(0x10000 - 0x100)
+#define CONFIG_SYS_INIT_RAM_SIZE	(0x10000 - CONFIG_SYS_SPL_MALLOC_SIZE)
 #define CONFIG_SYS_INIT_SP_ADDR					\
 	(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_SIZE -	\
 	GENERATED_GBL_DATA_SIZE)