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/chromebook_link_defconfig b/configs/chromebook_link_defconfig
index 1bcf9ce..fa3641e 100644
--- a/configs/chromebook_link_defconfig
+++ b/configs/chromebook_link_defconfig
@@ -60,6 +60,8 @@
 CONFIG_REGMAP=y
 CONFIG_SYSCON=y
 # CONFIG_ACPIGEN is not set
+CONFIG_LBA48=y
+CONFIG_SYS_64BIT_LBA=y
 CONFIG_CPU=y
 CONFIG_DM_I2C=y
 CONFIG_SYS_I2C_INTEL=y