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/ls2080aqds_sdcard_defconfig b/configs/ls2080aqds_sdcard_defconfig
index f724c0e..7aae9ed 100644
--- a/configs/ls2080aqds_sdcard_defconfig
+++ b/configs/ls2080aqds_sdcard_defconfig
@@ -33,6 +33,7 @@
 CONFIG_BOOTCOMMAND="mmc read 0x80200000 0x6800 0x800; fsl_mc apply dpl 0x80200000 && mmc read $kernel_load $kernel_start $kernel_size && bootm $kernel_load"
 CONFIG_RESET_PHY_R=y
 CONFIG_SPL_MAX_SIZE=0x16000
+CONFIG_SPL_BSS_MAX_SIZE=0x100000
 CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR=y
 CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR=0x8b0
 CONFIG_SPL_ENV_SUPPORT=y