mfd: qcom-spmi-pmic: Sort compatibles in the driver

Sort the compatibles in the driver, to make it easier to validate that
the DT binding and driver are in sync.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20211017161218.2378176-2-bjorn.andersson@linaro.org