clk: qcom: Avoid turning off the CPUSS AHB clocks during LPM state

The clock driver sets the sleep_ena bits to allow the cpuss_ahb_clk
and sys_noc_cpuss_ahb_clk clocks to be disabled by hardware during
certain low power modes.
The PCIe hardware controller might however need these clocks to be
on at this time to make certain accesses.
Remove setting the sleep_ena bits to keep these clocks enabled at
all times, while the CX rail is on, in order to resolve this issue.

Change-Id: I9e13793a67793c9531a9c6fe18b3bafbcea41891
Signed-off-by: Deepak Katragadda <dkatraga@codeaurora.org>