cobalt/rtdm: Increase RTDM_MAX_MINOR to 4096 form 1024

Increase the number of RTDM devices that are allowed to be registered to 4096 to allow gpio drivers with higher pin numbers to be able to register in rtdm space.

include/cobalt/kernel/rtdm/driver.h

@@ -94,7 +94,7 @@ enum rtdm_selecttype;
 /** @} Device Flags */
 
 /** Maximum number of named devices per driver. */
-#define RTDM_MAX_MINOR	1024
+#define RTDM_MAX_MINOR	4096
 
 /** @} rtdm_device_register */