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/theadorable_debug_defconfig b/configs/theadorable_debug_defconfig
index a3d6313..25eb2e8 100644
--- a/configs/theadorable_debug_defconfig
+++ b/configs/theadorable_debug_defconfig
@@ -67,6 +67,7 @@
 CONFIG_SPL_OF_TRANSLATE=y
 CONFIG_SATA_MV=y
 CONFIG_SYS_SATA_MAX_DEVICE=1
+CONFIG_LBA48=y
 CONFIG_BOOTCOUNT_LIMIT=y
 CONFIG_BOOTCOUNT_RAM=y
 CONFIG_FPGA_ALTERA=y