drivers: udc_ambiq: do not leak UDC_AMBIQ_MAX_QMESSAGES

Do not leak UDC_AMBIQ_MAX_QMESSAGES Kconfig option.

Signed-off-by: Johann Fischer <johann.fischer@nordicsemi.no>

Author: jfischer-no

drivers/usb/udc/Kconfig.ambiq

@@ -11,16 +11,16 @@ config UDC_AMBIQ
 	help
 	  Enable USB Device Controller Driver.
 
+if UDC_AMBIQ
+
 config UDC_AMBIQ_STACK_SIZE
 	int "UDC AMBIQ driver internal thread stack size"
-	depends on UDC_AMBIQ
 	default 2048
 	help
 	  AMBIQ driver internal thread stack size.
 
 config UDC_AMBIQ_THREAD_PRIORITY
 	int "UDC AMBIQ driver thread priority"
-	depends on UDC_AMBIQ
 	default 8
 	help
 	  AMBIQ driver thread priority.
@@ -32,3 +32,5 @@ config UDC_AMBIQ_MAX_QMESSAGES
 	default 8
 	help
 	  AMBIQ maximum number of ISR event messages.
+
+endif # UDC_AMBIQ