lib: utils: Add fdt_parse_hart_id() function

Parsing HART id from a CPU DT node is a common requirement for
RISC-V systems. The newly added fdt_parse_hart_id() also helps
reduce duplicate code between fdt_cpu_fixup() function and
fdt_parse_hart_count() function.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>

include/sbi_utils/fdt/fdt_helper.h

@@ -10,6 +10,8 @@
 #ifndef __FDT_HELPER_H__
 #define __FDT_HELPER_H__
 
+#include <sbi/sbi_types.h>
+
 struct fdt_match {
 	const char *compatible;
 	void *data;
@@ -37,6 +39,8 @@ int fdt_find_match(void *fdt, const struct fdt_match *match_table,
 int fdt_get_node_addr_size(void *fdt, int node, unsigned long *addr,
 			   unsigned long *size);
 
+int fdt_parse_hart_id(void *fdt, int cpu_offset, u32 *hartid);
+
 int fdt_parse_sifive_uart_node(void *fdt, int nodeoffset,
 			       struct platform_uart_data *uart);