Missing description for mip CSR

[james-ball-qualcomm]

[dhower-qc]

It's not missing, it's just brief. The description is "Machine Interrupt Pending bits"

[james-ball-qualcomm]

Can we make it more descriptive then? Maybe move some of the content from mie to mip? Or at least tell people to look at mie's description (ideally with a link) if the intent is that mie's description covers both mie and mip?