superfluous colon in soc_cpu_idle.h prevents compiling with arm-none-eabi-gcc 12.2

[TorstenRobitzki]

While trying to build a project for nrf53 with an arm-none-eabi-gcc (gcc version 12.2.1 20221205) the build fails to compile cpu_idle.S. The failing line is this:

#if defined(CONFIG_ARM_ON_EXIT_CPU_IDLE)
    /* Inline the macro provided by SoC-specific code */
    SOC_ON_EXIT_CPU_IDLE
#endif /* CONFIG_ARM_ON_EXIT_CPU_IDLE */

The definition of SOC_ON_EXIT_CPU_IDLE is within soc/arm/nordic_nrf/nrf53/soc_cpu_idle.h:

#define SOC_ON_EXIT_CPU_IDLE
.rept 8
nop;
.endr

The error message of the assembler is:

...zephyr/arch/arm/core/aarch32/cpu_idle.S: Assembler messages:
...zephyr/arch/arm/core/aarch32/cpu_idle.S:137: Error: garbage following instruction -- `nop .linefile 137 .'

I think, the ; behind the `nop´ is superfluous and should be removed.

[TorstenRobitzki]

There is already a merge request for that: #67080