hal_nxp: mcux: Gate SMC/LLWU HAL drivers on config

Convert SMC driver inclusion from SOC-specific configuration to
devicetree-based configuration:
- CONFIG_SOC_SERIES_KINETIS_K2X → CONFIG_DT_HAS_NXP_SMC_ENABLED
- CONFIG_SOC_SERIES_KE1XZ → CONFIG_DT_HAS_NXP_SMC_ENABLED

Gate LLWU HAL driver on CONFIG_WUC_MCUX_LLWU (the Zephyr WUC driver
Kconfig) rather than DT node presence, since the DT node may exist
in disabled state without the driver being needed.

Signed-off-by: Holt Sun <holt.sun@nxp.com>