platform: Include TFM_BSS in zero table for link script templates

While the copy table included the default data segment for these
templates, the zero table didn't include the default bss segment.

Make sure that area gets initialized to zero using the table-based
mechanism instead of relying on the startup code to initialize it
explicitly.

Signed-off-by: Keith Packard <keithp@keithp.com>

Author: keith-packard

platform/ext/common/gcc/tfm_common_s.ld.template

@@ -270,6 +270,9 @@ SECTIONS
         /* .zero.table */
         . = ALIGN(4);
         __zero_table_start__ = .;
+        LONG (ADDR(.TFM_BSS))
+        LONG (SIZEOF(.TFM_BSS) / 4)
+
         LONG (ADDR(.TFM_PSA_ROT_LINKER_BSS))
         LONG (SIZEOF(.TFM_PSA_ROT_LINKER_BSS) / 4)
 

platform/ext/common/gcc/tfm_isolation_s.ld.template

@@ -258,6 +258,9 @@ SECTIONS
         /* .zero.table */
         . = ALIGN(4);
         __zero_table_start__ = .;
+        LONG (ADDR(.TFM_BSS))
+        LONG (SIZEOF(.TFM_BSS) / 4)
+
 {% for partition in partitions %}
         LONG (ADDR(.ER_{{partition.manifest.name}}_BSS))
         LONG (SIZEOF(.ER_{{partition.manifest.name}}_BSS) / 4)