include: rtos: interrupt.h: simplify interrupt_get_irq macro logic

The imx-related macro logic from `interrupt_get_irq` can be
simplified. Now that `CONFIG_IMX93_A55` selects `CONFIG_IMX`,
`interrupt_get_irq` should return the INTID for all imx platforms
except for imx8m, which is yet to be transitioned to zephyr
native drivers.

Signed-off-by: Laurentiu Mihalcea <laurentiu.mihalcea@nxp.com>

zephyr/include/rtos/interrupt.h

@@ -49,8 +49,7 @@ static inline void interrupt_unregister(uint32_t irq, const void *arg)
 static inline int interrupt_get_irq(unsigned int irq, const char *cascade)
 {
 #if defined(CONFIG_LIBRARY) || defined(CONFIG_ACE) || defined(CONFIG_CAVS) || \
- defined(CONFIG_ZEPHYR_POSIX) || defined(CONFIG_ARM64) || \
- defined(CONFIG_IMX8) || defined(CONFIG_IMX8X) || defined(CONFIG_IMX8ULP)
+ defined(CONFIG_ZEPHYR_POSIX) || (defined(CONFIG_IMX) && !defined(CONFIG_IMX8M))
  return irq;
 #else
  if (cascade == irq_name_level2)