ti_armv7_keystone2: Define scratch space in SRAM

Scratch space can be used for features such as board detection. Define
an area within SRAM that can be used for this purpose.

[rogerq@ti.com] Rename EEPROM macro
Signed-off-by: NFranklin S Cooper Jr <fcooper@ti.com>
Signed-off-by: NRoger Quadros <rogerq@ti.com>

include/configs/ti_armv7_keystone2.h

@@ -55,6 +55,13 @@
 #define CONFIG_SPL_SPI_LOAD
 #define CONFIG_SYS_SPI_U_BOOT_OFFS	CONFIG_SPL_PAD_TO
 
+/* SRAM scratch space entries  */
+#define SRAM_SCRATCH_SPACE_ADDR	CONFIG_SPL_STACK + 0x8
+
+#define TI_SRAM_SCRATCH_BOARD_EEPROM_START	(SRAM_SCRATCH_SPACE_ADDR)
+#define TI_SRAM_SCRATCH_BOARD_EEPROM_END	(SRAM_SCRATCH_SPACE_ADDR + 0x200)
+#define KEYSTONE_SRAM_SCRATCH_SPACE_END		(TI_SRAM_SCRATCH_BOARD_EEPROM_END)
+
 /* UART Configuration */
 #define CONFIG_SYS_NS16550_MEM32
 #if defined(CONFIG_SPL_BUILD) || !defined(CONFIG_DM_SERIAL)