lora: sx126x: don't re-enable interrupt in sleep
lora: sx126x: don't re-enable interrupt in sleep

Don't re-enable the DIO1 interrupt when the modem is in sleep mode. This
fixes the power regression introduced in Zephyr v2.7.0 #41026.

Signed-off-by: Jordan Yates <d74a90e280bbad1cc3646781a4e234b467b60fe1@data61.csiro.au>

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