lib: sbi: Introduce sbi_entry_count() function

We introduce sbi_entry_count() function which counts the number
of times a HART enters OpenSBI via cold-boot or warm-boot path.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>

include/sbi/sbi_init.h

@@ -16,6 +16,8 @@ struct sbi_scratch;
 
 void __noreturn sbi_init(struct sbi_scratch *scratch);
 
+unsigned long sbi_entry_count(u32 hartid);
+
 unsigned long sbi_init_count(u32 hartid);
 
 void __noreturn sbi_exit(struct sbi_scratch *scratch);