arm: rockchip: rk3399: Move common configs in Kconfig

Few SPL and U-Boot proper configs are common to all rk3399 target
defconfigs, move them and select it from platform kconfig.

Moved configs:
-  SPL_ATF
-  SPL_ATF_NO_PLATFORM_PARAM if SPL_ATF
-  SPL_LOAD_FIT
-  SPL_CLK if SPL
-  SPL_PINCTRL if SPL
-  SPL_RAM if SPL
-  SPL_REGMAP if SPL
-  SPL_SYSCON if SPL
-  CLK
-  FIT
-  PINCTRL
-  RAM
-  REGMAP
-  SYSCON
-  DM_PMIC
-  DM_REGULATOR_FIXED

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>