fix: variant WB55R(C-E-G)V linker script update SRAM2a SRAM2b

Reduce SRAM2a size depending on BLE secure contraint
imposed by Firmware Stack Full Extended
Add SRAM2b, as not enough place in SRAM2a

Signed-off-by: Alexandre Bourdiol <alexandre.bourdiol@st.com>

Author: ABOSTM

Diff for: variants/STM32WBxx/WB55R(C-E-G)V/ldscript.ld

@@ -47,7 +47,8 @@ MEMORY
 {
 FLASH (rx)                 : ORIGIN = 0x08000000 + LD_FLASH_OFFSET, LENGTH = LD_MAX_SIZE - LD_FLASH_OFFSET
 RAM1 (xrw)                 : ORIGIN = 0x20000004, LENGTH = LD_MAX_DATA_SIZE - 4
-RAM_SHARED (xrw)           : ORIGIN = 0x20030000, LENGTH = 10K
+RAM_SHARED_SRAM2a (xrw)    : ORIGIN = 0x20030000, LENGTH = 2K  /* Limited by OptionByte SBRSA when loading firmware Full stack extended */
+RAM_SHARED_SRAM2b (xrw)    : ORIGIN = 0x20038000, LENGTH = 10K  /* Limited by OptionByte SNBRSA when loading firmware Full stack extended */
 }
 
 /* Define output sections */
@@ -168,7 +169,7 @@ SECTIONS
   }
 
   .ARM.attributes 0       : { *(.ARM.attributes) }
-   MAPPING_TABLE (NOLOAD) : { *(MAPPING_TABLE) } >RAM_SHARED
-   MB_MEM1 (NOLOAD)       : { *(MB_MEM1) } >RAM_SHARED
-   MB_MEM2 (NOLOAD)       : { _sMB_MEM2 = . ; *(MB_MEM2) ; _eMB_MEM2 = . ; } >RAM_SHARED
+   MAPPING_TABLE (NOLOAD) : { *(MAPPING_TABLE) } >RAM_SHARED_SRAM2a
+   MB_MEM1 (NOLOAD)       : { *(MB_MEM1) } >RAM_SHARED_SRAM2a
+   MB_MEM2 (NOLOAD)       : { _sMB_MEM2 = . ; *(MB_MEM2) ; _eMB_MEM2 = . ; } >RAM_SHARED_SRAM2b
 }