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/octeon_nic23_defconfig b/configs/octeon_nic23_defconfig
index 5330915..23cdef3 100644
--- a/configs/octeon_nic23_defconfig
+++ b/configs/octeon_nic23_defconfig
@@ -45,6 +45,8 @@
 CONFIG_TFTP_TSIZE=y
 CONFIG_SATA=y
 CONFIG_AHCI_MVEBU=y
+CONFIG_LBA48=y
+CONFIG_SYS_64BIT_LBA=y
 CONFIG_CLK=y
 # CONFIG_INPUT is not set
 CONFIG_MISC=y