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/beaver_defconfig b/configs/beaver_defconfig
index 7684ae6..a4d299e 100644
--- a/configs/beaver_defconfig
+++ b/configs/beaver_defconfig
@@ -21,10 +21,10 @@
 CONFIG_SPL_FOOTPRINT_LIMIT=y
 CONFIG_SPL_MAX_FOOTPRINT=0x8000
 # CONFIG_SPL_SHARES_INIT_SP_ADDR is not set
-CONFIG_SYS_SPL_MALLOC=y
-CONFIG_HAS_CUSTOM_SPL_MALLOC_START=y
-CONFIG_CUSTOM_SYS_SPL_MALLOC_ADDR=0x80090000
-CONFIG_SYS_SPL_MALLOC_SIZE=0x10000
+CONFIG_SPL_SYS_MALLOC=y
+CONFIG_SPL_HAS_CUSTOM_MALLOC_START=y
+CONFIG_SPL_CUSTOM_SYS_MALLOC_ADDR=0x80090000
+CONFIG_SPL_SYS_MALLOC_SIZE=0x10000
 CONFIG_SYS_PROMPT="Tegra30 (Beaver) # "
 CONFIG_SYS_MAXARGS=64
 CONFIG_SYS_PBSIZE=2084