Convert CONFIG_SPL_NAND_LOAD et al to Kconfig

This converts the following to Kconfig:
   CONFIG_SPL_NAND_LOAD
   CONFIG_SYS_NAND_BLOCK_SIZE
   CONFIG_SYS_NAND_PAGE_SIZE
   CONFIG_SYS_NAND_OOBSIZE

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/include/configs/corenet_ds.h b/include/configs/corenet_ds.h
index 79fca96..7fd1ad1 100644
--- a/include/configs/corenet_ds.h
+++ b/include/configs/corenet_ds.h
@@ -172,7 +172,6 @@
 
 #define CONFIG_SYS_NAND_BASE_LIST     {CONFIG_SYS_NAND_BASE}
 #define CONFIG_SYS_MAX_NAND_DEVICE	1
-#define CONFIG_SYS_NAND_BLOCK_SIZE    (128 * 1024)
 
 /* NAND flash config */
 #define CONFIG_SYS_NAND_BR_PRELIM  (BR_PHYS_ADDR(CONFIG_SYS_NAND_BASE_PHYS) \
@@ -382,7 +381,7 @@
  */
 #define CONFIG_SYS_FMAN_FW_ADDR	(512 * 1680)
 #elif defined(CONFIG_MTD_RAW_NAND)
-#define CONFIG_SYS_FMAN_FW_ADDR	(8 * CONFIG_SYS_NAND_BLOCK_SIZE)
+#define CONFIG_SYS_FMAN_FW_ADDR	(8 * (128 * 1024))
 #elif defined(CONFIG_SRIO_PCIE_BOOT_SLAVE)
 /*
  * Slave has no ucode locally, it can fetch this from remote. When implementing