forked from Mirrors/opensbi

To track nested traps, the struct sbi_scratch needs a pointer the current trap context so add trap_context pointer in struct sbi_context. Signed-off-by: Anup Patel <apatel@ventanamicro.com> Reviewed-by: Samuel Holland <samuel.holland@sifive.com> Tested-by: Samuel Holland <samuel.holland@sifive.com>