include: Remove disabled_hart_mask from sbi_platform

The disabled_hard_mask in sbi_platform is only 64bits wide so we
cannot disable a HART with HARTID > 63. To tackle this, we remove
disabled_hart_mask and replace it with hart_disabled() platform
callback.

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

platform/ariane-fpga/platform.c

@@ -201,6 +201,5 @@ const struct sbi_platform platform = {
 	.features = SBI_ARIANE_FEATURES,
 	.hart_count = ARIANE_HART_COUNT,
 	.hart_stack_size = 4096,
-	.disabled_hart_mask = 0,
 	.platform_ops_addr = (unsigned long)&platform_ops
 };