arm: baltos: move CONFIG_SYS_NAND_U_BOOT_OFFS to defconfig

Also get rid of CONFIG_SYS_NAND_SPL_KERNEL_OFFS as SPL_OS_BOOT
feature won't be used.

Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/am335x_baltos_defconfig b/configs/am335x_baltos_defconfig
index 4e68956..74fd487 100644
--- a/configs/am335x_baltos_defconfig
+++ b/configs/am335x_baltos_defconfig
@@ -47,6 +47,8 @@
 CONFIG_MMC_OMAP_HS=y
 CONFIG_MMC_OMAP_HS_ADMA=y
 CONFIG_NAND=y
+CONFIG_SYS_NAND_U_BOOT_LOCATIONS=y
+CONFIG_SYS_NAND_U_BOOT_OFFS=0x00080000
 CONFIG_PHY_ADDR_ENABLE=y
 CONFIG_MII=y
 CONFIG_DRIVER_TI_CPSW=y