clk: qcom: 8916: Add clock definitions

Add pcnoc_usb_a_clk, snoc_usb_a_clk, bimc_usb_a_clk clocks
for nominal voting support on 8916 target.

Change-Id: Ic60c8ffe646dd192d438faddd75d27f9a0850083
Signed-off-by: Sujeet Kumar <ksujeet@codeaurora.org>