clk: gcc-msm8996: Fix pcie 2 pipe register offset

This patch corrects the register offset for pcie2 pipe clock.
Offset according to datasheet is 0x6e018 instead of 0x6e108.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Fixes: b1e010c0 ("clk: qcom: Add MSM8996 Global Clock Control (GCC) driver")
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>