fs: touch up predicts in inode_permission()

fs: touch up predicts in inode_permission()

The routine only encounters errors when people try to access things they
can't, which is a negligible amount of calls.

The only questionable bit might be the pre-existing predict around
MAY_WRITE. Currently the routine is predominantly used for MAY_EXEC, so
this makes some sense.

I verified this straightens out the asm.

Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Link: https://lore.kernel.org/20250416221626.2710239-2-mjguzik@gmail.com
Signed-off-by: Christian Brauner <brauner@kernel.org>