ARM: dts: msm: update PCIe clock frequencies for SM8150

With the new addition of PCIe sleep clock in PCIe bus driver,
update PCIe clock frequency tables for SM8150.

Change-Id: I555f7cd3427a2897e99dd8d60480602fb225b1a7
Signed-off-by: Tony Truong <truong@codeaurora.org>