clk: qcom: Add halt_reg offset for pcie pipe clock

halt_reg offset for pcie pipe clock is requierd to
avoid the writing into regmap base GCC register for
clk_set_flags API.

Change-Id: I168c376883dab2c7a8f524060764d2f52f22bd34
Signed-off-by: Odelu Kukatla <okukatla@codeaurora.org>