Convert CONFIG_SPL_BSS_MAX_SIZE et al to Kconfig

This converts the following to Kconfig:
   CONFIG_SPL_BSS_MAX_SIZE
   CONFIG_SPL_MAX_FOOTPRINT

Note that the da850evm platforms were violating the "only use one" rule
here, and so now hard-code their BSS limit.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/coreboot64_defconfig b/configs/coreboot64_defconfig
index a61f869..3bd099e 100644
--- a/configs/coreboot64_defconfig
+++ b/configs/coreboot64_defconfig
@@ -20,6 +20,7 @@
 CONFIG_SYS_CONSOLE_INFO_QUIET=y
 CONFIG_DISPLAY_BOARDINFO_LATE=y
 CONFIG_LAST_STAGE_INIT=y
+CONFIG_SPL_NO_BSS_LIMIT=y
 CONFIG_HUSH_PARSER=y
 CONFIG_SYS_PBSIZE=532
 CONFIG_CMD_IDE=y