clk: qcom: gcc: Update halt_check flag for the PCIe pipe clks

Pipe clocks are sourced from the external PHY, so skip the checking
of the clk_off bit in the halt register.

Change-Id: Ib43ccef47877675cda3cb28134306b5d3efc55a2
Signed-off-by: Veera Vegivada <vvegivad@codeaurora.org>