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/goflexhome_defconfig b/configs/goflexhome_defconfig
index cdd71b3..1ef4d6c 100644
--- a/configs/goflexhome_defconfig
+++ b/configs/goflexhome_defconfig
@@ -51,6 +51,7 @@
 CONFIG_DM=y
 CONFIG_SATA_MV=y
 CONFIG_SYS_SATA_MAX_DEVICE=1
+CONFIG_LBA48=y
 # CONFIG_MMC is not set
 CONFIG_MTD=y
 CONFIG_MTD_RAW_NAND=y