Convert CONFIG_BOARD_ECC_SUPPORT to Kconfig

This converts the following to Kconfig:
   CONFIG_BOARD_ECC_SUPPORT
Signed-off-by: NTom Rini <trini@konsulko.com>

arch/arm/mach-mvebu/Kconfig

@@ -152,6 +152,7 @@ config TARGET_OCTEONTX2_CN913x
 
 config TARGET_DB_MV784MP_GP
 	bool "Support db-mv784mp-gp"
+	select BOARD_ECC_SUPPORT
 	select MV78460
 
 config TARGET_DS414
@@ -160,6 +161,7 @@ config TARGET_DS414
 
 config TARGET_MAXBCM
 	bool "Support maxbcm"
+	select BOARD_ECC_SUPPORT
 	select MV78460
 
 config TARGET_THEADORABLE
@@ -226,6 +228,9 @@ config DDR_RESET_ON_TRAINING_FAILURE
 	  device will still hang - it doesn't make sense to reset the board
 	  in such a case.
 
+config BOARD_ECC_SUPPORT
+	bool
+
 config SYS_BOARD
 	default "clearfog" if TARGET_CLEARFOG
 	default "helios4" if TARGET_HELIOS4

include/configs/db-mv784mp-gp.h

@@ -72,6 +72,5 @@
 
 /* Enable DDR support in SPL (DDR3 training from Marvell bin_hdr) */
 #define CONFIG_SPD_EEPROM		0x4e
-#define CONFIG_BOARD_ECC_SUPPORT	/* this board supports ECC */
 
 #endif /* _CONFIG_DB_MV7846MP_GP_H */

include/configs/maxbcm.h

@@ -64,6 +64,5 @@
 
 /* Enable DDR support in SPL (DDR3 training from Marvell bin_hdr) */
 #define CONFIG_SYS_SDRAM_SIZE		SZ_1G
-#define CONFIG_BOARD_ECC_SUPPORT	/* this board supports ECC */
 
 #endif /* _CONFIG_DB_MV7846MP_GP_H */