reset: ti_syscon: fix a ti_syscon_reset_status issue

If STATUS_SET was not set, ti_syscon_reset_status would always return 0
no matter whether the status_bit was set or not.

Signed-off-by: Jiancheng Xue <xuejiancheng@hisilicon.com>
Fixes: cc7c2bb1 ("reset: add TI SYSCON based reset driver")
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>