configs: stm32mp1: Remove misleading CONFIG_SPL_BSS_START_ADDR

CONFIG_SPL_BSS_START_ADDR is only used on a few mach- linker scripts.
stm32mp1 uses the generic script under arch/arm/cpu/u-boot-spl.lds,
which does not make use of this definition.

The SPL BSS starts in SRAM, right after .text, .rodata, .data, and
.u_boot_list. A very short version of the STM32MP1 memory map is:
  * SYSRAM: 2ffc0000 - 30000000     <- all of SPL is here
  * DRAM:   c0000000+

0xC0200000 is a DRAM address, and has nothing to do with SPL. It is
just very misleading to have it next to CONFIG_SPL_BSS_MAX_SIZE, or to
have it at all.
Signed-off-by: NAlexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-by: NPatrice Chotard <patrice.chotard@foss.st.com>
Reviewed-by: NPatrick Delaunay <patrick.delaunay@foss.st.com>

include/configs/stm32mp1.h

@@ -50,7 +50,6 @@
 /* SPL support */
 #ifdef CONFIG_SPL
 /* SPL use DDR */
-#define CONFIG_SPL_BSS_START_ADDR	0xC0200000
 #define CONFIG_SPL_BSS_MAX_SIZE		0x00100000
 #define CONFIG_SYS_SPL_MALLOC_START	0xC0300000
 #define CONFIG_SYS_SPL_MALLOC_SIZE	0x01D00000