lib: utils: Add fdt_parse_plic_node() function

We add fdt_parse_plic_node() function which will allow us to parse
a particular DT node as PLIC node. This will be useful in parsing
the DT node which we have found by matching compatible string.

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

include/sbi_utils/fdt/fdt_helper.h

@@ -52,6 +52,9 @@ int fdt_parse_uart8250_node(void *fdt, int nodeoffset,
 int fdt_parse_uart8250(void *fdt, struct platform_uart_data *uart,
 		       const char *compatible);
 
+int fdt_parse_plic_node(void *fdt, int nodeoffset,
+			struct platform_plic_data *plic);
+
 int fdt_parse_plic(void *fdt, struct platform_plic_data *plic,
 		   const char *compatible);