kconfig: NXP IMX: Remove unused HAS_IMX_{RDC,CCM} symbols
kconfig: NXP IMX: Remove unused HAS_IMX_{RDC,CCM} symbols

The HAS_IMX_{RDC,CCM} symbols were added to ext/hal/nxp/imx/Kconfig in
commit 3afc2b6c61 ("ext/hal/nxp/imx: Import the nxp imx7 freertos bsp"),
and later copied over to modules/Kconfig.imx in commit 12438e1047 ("ext:
hal: Make NXP HALs a Zephyr module").

Never used.

Signed-off-by: Ulf Magnusson <01743f1c1deb1fe75271d62edb65757d98ac0bcb@nordicsemi.no>

galak/zephyr,zephyrproject-rtos/zephyr,nashif/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,Vudentz/zephyr,Vudentz/zephyr,finikorg/zephyr,nashif/zephyr,galak/zephyr,finikorg/zephyr,nashif/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,nashif/zephyr,Vudentz/zephyr,nashif/zephyr,finikorg/zephyr,Vudentz/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,finikorg/zephyr,Vudentz/zephyr,Vudentz/zephyr