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/mvebu_db_armada8k_defconfig b/configs/mvebu_db_armada8k_defconfig
index 0b4afbe..d3633d0 100644
--- a/configs/mvebu_db_armada8k_defconfig
+++ b/configs/mvebu_db_armada8k_defconfig
@@ -43,6 +43,8 @@
 CONFIG_ARP_TIMEOUT=200
 CONFIG_NET_RETRY_COUNT=50
 CONFIG_AHCI_MVEBU=y
+CONFIG_LBA48=y
+CONFIG_SYS_64BIT_LBA=y
 CONFIG_DM_I2C=y
 CONFIG_SYS_I2C_MVTWSI=y
 CONFIG_MISC=y