soc: riscv: telink_b91: B91 BLE controller support (linker aes_data)

Introduced new aes_data linker section used by B91 BLE controller.

Signed-off-by: Yuriy Vynnychek <yura.vynnychek@telink-semi.com>

soc/riscv/riscv-privilege/telink_b91/linker.ld

@@ -30,6 +30,16 @@ SECTIONS
 
 SECTIONS
 {
+	SECTION_DATA_PROLOGUE(aes_data,,)
+	{
+		. = ALIGN(8);
+		*(.aes_data)
+		*(".aes_data.*")
+
+		PROVIDE (_AES_DATA_VMA_END = .);
+		PROVIDE (_AES_DATA_VMA_START = ADDR(aes_data));
+	} GROUP_DATA_LINK_IN(RAM_ILM, ROMABLE_REGION)
+
 	SECTION_DATA_PROLOGUE(retention_data,,)
 	{
 		. = ALIGN(8);

soc/riscv/riscv-privilege/telink_b91/start.S

@@ -42,6 +42,16 @@ start:
 	li t0, (1 << 8) | (1 << 6)
 	csrs NDS_MMISC_CTL, t0
 
+_ZERO_AES:
+	lui    t0, 0
+	la     t2, _AES_DATA_VMA_START
+	la     t3, _AES_DATA_VMA_END
+_ZERO_AES_BEGIN:
+	bleu   t3, t2, _RETENTION_DATA_INIT
+	sw     t0, 0(t2)
+	addi   t2, t2, 4
+	j      _ZERO_AES_BEGIN
+
 _RETENTION_DATA_INIT:
 	la     t1, _RETENTION_DATA_LMA_START
 	la     t2, _RETENTION_DATA_VMA_START