Convert CONFIG_LBA48 et al to Kconfig

This converts the following to Kconfig:
   CONFIG_LBA48
   CONFIG_SYS_64BIT_LBA

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/nsa310s_defconfig b/configs/nsa310s_defconfig
index 8b525eb..0c1d808 100644
--- a/configs/nsa310s_defconfig
+++ b/configs/nsa310s_defconfig
@@ -52,6 +52,8 @@
 CONFIG_DM=y
 CONFIG_SATA_MV=y
 CONFIG_SYS_SATA_MAX_DEVICE=1
+CONFIG_LBA48=y
+CONFIG_SYS_64BIT_LBA=y
 # CONFIG_MMC is not set
 CONFIG_MTD=y
 CONFIG_MTD_RAW_NAND=y