soc: qcom: dfc: Enable flow after ps work is marked as inactive

Fixed a condition that flow was enabled before powersave work is
marked as inactive. This could lead to UL packets not trigger a
new powersave work and cause data stall.

CRs-fixed: 2324912
Change-Id: Iba2ee6ce2f8a51ac9293959f32a61adc34d8e9fe
Acked-by: Weiyi Chen <weiyic@qti.qualcomm.com>
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>