configs: imx8mn_beacon: Re-align memory to standard imx8mn settings

The imx8mn_beacon board does not use the same memory map as the reference
design from NXP or other imx8mn boards.  As such, memory is more limited
in SPL.

Moving SPL_BSS_START_ADDR and SPL_STACK to default locations increases
the amount of available meory for the SPL stack.  Doing this allows
the board to no longer define CONFIG_MALLOC_F_ADDR.

Since SYS_LOAD_ADDR also does not align with other boards, move it too.

Signed-off-by: Adam Ford <aford173@gmail.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
diff --git a/configs/imx8mn_beacon_defconfig b/configs/imx8mn_beacon_defconfig
index 0d8601a..c9d0b64 100644
--- a/configs/imx8mn_beacon_defconfig
+++ b/configs/imx8mn_beacon_defconfig
@@ -15,10 +15,9 @@
 CONFIG_SYS_PROMPT="u-boot=> "
 CONFIG_SPL_SERIAL=y
 CONFIG_SPL_DRIVERS_MISC=y
-CONFIG_SPL_SYS_MALLOC_F_LEN=0x2000
 CONFIG_SPL=y
 CONFIG_SPL_IMX_ROMAPI_LOADADDR=0x48000000
-CONFIG_SYS_LOAD_ADDR=0x40480000
+CONFIG_SYS_LOAD_ADDR=0x42000000
 CONFIG_SYS_MEMTEST_START=0x40000000
 CONFIG_SYS_MEMTEST_END=0x44000000
 CONFIG_LTO=y
@@ -34,12 +33,12 @@
 CONFIG_ARCH_MISC_INIT=y
 CONFIG_SPL_MAX_SIZE=0x25000
 CONFIG_SPL_HAS_BSS_LINKER_SECTION=y
-CONFIG_SPL_BSS_START_ADDR=0x95e000
+CONFIG_SPL_BSS_START_ADDR=0x950000
 CONFIG_SPL_BSS_MAX_SIZE=0x2000
 CONFIG_SPL_BOARD_INIT=y
 CONFIG_SPL_BOOTROM_SUPPORT=y
 # CONFIG_SPL_SHARES_INIT_SP_ADDR is not set
-CONFIG_SPL_STACK=0x187ff0
+CONFIG_SPL_STACK=0x980000
 CONFIG_SYS_SPL_MALLOC=y
 CONFIG_HAS_CUSTOM_SPL_MALLOC_START=y
 CONFIG_CUSTOM_SYS_SPL_MALLOC_ADDR=0x42200000