Cleaned up various bits with capability syscalls.

Made grant interace same as other calls.
Corrected counting and reading of task capabilities by applying it
to all cap lists that a task has right.

include/l4/api/capability.h

@@ -30,8 +30,4 @@
 #define CAP_SPLIT_ACCESS		0x00000002
 #define CAP_SPLIT_RANGE			0x00000003 /* Returns -EPERM */
 
-/* Task's primary capability list */
-#define TASK_CAP_LIST(task)	\
-	(&((task)->space->cap_list))
-
 #endif /* __API_CAPABILITY_H__ */