bsp: nxp/mcx/mcxa/frdm-mcxa153: Kconfig: Remove ARCH_ARM_CORTEX_SECURE

MCXA153 does not support CMSE (Secure Extension). Remove it from Kconfig.

Minor: Fixed a typo in Kconfig which makes Kconfig fail on
case-sensitive operating system.

Minor: Fixed a Kconfig defined incorrect SOC name
(SOC_MCXN947 -> SOC_MCXA156)

Signed-off-by: Yilin Sun <imi415@imi.moe>

Author: imi415