drivers: cc13xx_cc26xx: pwm: enable pwm(gpt) in sleep/deepsleep mode

- enabled GPT(PWM) peripheral for sleep/deepsleep mode in init_pwm()
- Fixed: undefined behaviour when using k_sleep()

Signed-off-by: Devansh Tanna <[email protected]>

Author: Devansh0210

drivers/pwm/pwm_cc13xx_cc26xx_timer.c

@@ -176,6 +176,8 @@ static int init_pwm(const struct device *dev)
 
 	/* Enable GPIO peripheral. */
 	PRCMPeripheralRunEnable(get_timer_peripheral(config));
+	PRCMPeripheralSleepEnable(get_timer_peripheral(config));
+	PRCMPeripheralDeepSleepEnable(get_timer_peripheral(config));
 
 	/* Load PRCM settings. */
 	PRCMLoadSet();