drivers: adc: tla2021: Raise default initialization priority

The TLA2021 driver depends on it's i2c controller and therefore needs
to be initialized later. ADC_INIT_PRIORITY by default equals
KERNEL_INIT_PRIORITY_DEVICE which should be used by independent devices.
Using this by default causing projects to fail where this driver is
enabled implicitly through board configuration and the priority is not
explicitly set.

Signed-off-by: Caspar Friedrich <[email protected]>

drivers/adc/Kconfig.tla2021

@@ -13,7 +13,7 @@ if ADC_TLA2021
 
 config ADC_TLA2021_INIT_PRIORITY
 	int "Priority for the driver initialization"
-	default ADC_INIT_PRIORITY
+	default 80
 	help
 	  Fine tune the priority for the driver initialization. Make sure it's
 	  higher (-> lower priority) than I2C_INIT_PRIORITY.