Move page fault handling logic
Move page fault handling logic

Move page fault handling code. This fixes an issue where if we page
faulted in kernel space (which should cause a panic) we "handle" it. Now
we correctly bomb out if we page fault in kernel space and allocate a
new page if its user space

williamsandrew/xv6,williamsandrew/xv6,TheDude05/xv6,williamsandrew/xv6,TheDude05/xv6,TheDude05/xv6