[PATCH] clean up compiler warnings in 2.5 bk

[Nathan Lynch]

Hi-

Attached patch cleans up some warnings I've seen when building ameslab
2.5 bk:

arch/ppc64/kernel/prom.c:194: warning: missing braces around initializer
arch/ppc64/kernel/prom.c:194: warning: (near initialization for
`hmt_thread_data[0]')
arch/ppc64/kernel/prom.c: In function `prom_hold_cpus':
arch/ppc64/kernel/prom.c:1076: warning: implicit declaration of function
`_get_PIR'
arch/ppc64/kernel/prom.c: In function `inspect_node':
arch/ppc64/kernel/prom.c:1578: warning: comparison between pointer and
integer

Also, the patch fixes an issue with our version of
include/linux/proc_fs.h.  It doesn't cause problems for ppc64, but when
built for something like i386, we see lots of:

include/linux/proc_fs.h:135: warning: `struct device_node' declared
inside parameter list
include/linux/proc_fs.h:135: warning: its scope is only this definition
or declaration, which is probably not what you want

There exist some other warnings from arch/ppc64/boot/prom.c that this
patch does not address (I don't really grok that code yet).

Nathan
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