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, which then fail because
the clocks dont turn on automatically as expected.
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: I2a5e69f6a405aa32bf9b36ab94e1dd228e514d6f
Signed-off-by: Deepak Katragadda <dkatraga@codeaurora.org>