clk: stm32mp1: move RCC reset controller into RCC clock driver

clk: stm32mp1: move RCC reset controller into RCC clock driver

RCC clock and reset controller shared same memory mapping.
As RCC clock driver is now a module, the best way to register clock
and reset controller is to do it in same driver.

Signed-off-by: Gabriel Fernandez <gabriel.fernandez@foss.st.com>
Link: https://lore.kernel.org/r/20210617051814.12018-6-gabriel.fernandez@foss.st.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>