clk: qcom: gcc-sdm845: Update the PCIe pipe clock structures

Clock clients would want to control the peripheral and core
memories of the PCIe pipe clocks on SDM845. Update the clock
structures for the same to allow doing so.

Change-Id: I67e0d053466d632cb369a52d541f2bc8a1a51cb8
Signed-off-by: Deepak Katragadda <dkatraga@codeaurora.org>