spl: Use CONFIG_SPL... instead of CONFIG_..._SPL_...

We like to put the SPL first so it is clear that it relates to SPL. Rename
various malloc-related options which have crept in, to stick to this
convention.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: Martyn Welch <martyn.welch@collabora.com>
Reviewed-by: Svyatoslav Ryhel <clamor95@gmail.com>
diff --git a/configs/am335x_pdu001_defconfig b/configs/am335x_pdu001_defconfig
index e68efde..557949c 100644
--- a/configs/am335x_pdu001_defconfig
+++ b/configs/am335x_pdu001_defconfig
@@ -24,8 +24,8 @@
 CONFIG_AUTOBOOT_STOP_STR=" "
 CONFIG_BOOTCOMMAND="run eval_boot_device;part uuid mmc ${mmc_boot}:${root_fs_partition} root_fs_partuuid;setenv bootargs console=${console} vt.global_cursor_default=0 root=PARTUUID=${root_fs_partuuid} rootfstype=ext4 rootwait rootdelay=1;fatload mmc ${mmc_boot} ${fdtaddr} ${fdtfile};fatload mmc ${mmc_boot} ${loadaddr} ${bootfile};bootz ${loadaddr} - ${fdtaddr}"
 CONFIG_BOARD_LATE_INIT=y
-CONFIG_SYS_SPL_MALLOC=y
-CONFIG_SYS_SPL_MALLOC_SIZE=0x800000
+CONFIG_SPL_SYS_MALLOC=y
+CONFIG_SPL_SYS_MALLOC_SIZE=0x800000
 # CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR is not set
 CONFIG_SPL_I2C=y
 # CONFIG_SPL_NAND_SUPPORT is not set