[PATCH v2 13/14] powerpc/64s: Fix comment on interrupt handler prologue

[Rohan McLure]

> Maybe it would be interesting to know from which patch the error comes.

It’s hard to attribute this to a single commit, but the distance between r10’s save
location and r11-r12’s save location has definitely grown over time. The comment is
introduced in commit 7180e3e636de
("[POWERPC] force 64bit mode in fwnmi handlers to workaround firmware bugs”) way back in 2006.

In v3 will insert another comment to better signal where r11-r12 are saved.