dt-bindings: clock: add Qualcomm MSM8953 GCC driver bindings

Add bindings and compatible to document MSM8953 GCC (Global Clock
Controller) driver.

Signed-off-by: Vladimir Lypak <junak.pub@gmail.com>
Signed-off-by: Adam Skladowski <a_skl39@protonmail.com>
Signed-off-by: Sireesh Kodali <sireeshkodali@protonmail.com>
Link: https://lore.kernel.org/r/Q6uB3NRxqtD8Prsmliv8ZdsTXGeviv7lb2jQ743jr1E@cp4-web-036.plabs.ch


Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>