ANDROID: Kconfig.gki: Add entries for qcom clk drivers

Add a Kconfig.gki option to enable qcom clk drivers.

This is needed as the qcom clk drivers are also used as power
domain sources. Unfortunately the powerdomain logic stops
returning EPROBE_DEFER when initcall_done is true (after
initcalls, but before modules load). This results in the drivers
(in our case, the smmu which is built in) that depend on the clk
provided power-domain to fail to load.

This issue seems to be due to the following commit, which when
reverted resolve the problem and allows dependent drivers to
still load once the clk modules are loaded:
 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e01afc32502555beb2057ddd74401be38475d851



I'm working with the patch author and Bjorn to try to find
a good upstream solution, but in the meantime, set the qcom
clks to =y for now.

Bug: 146449535
Change-Id: Iaf6655a22243335083c0f7b3a673e795cea68021
Signed-off-by: John Stultz <john.stultz@linaro.org>