[PATCH] powerpc: fix system.h fallout in sysdev/scom.c [chroma_defconfig]

[David Howells]

Paul Gortmaker <paul.gortmaker at windriver.com> wrote:

> The following shows up in chroma_defconfig:
> 
>  CC      arch/powerpc/sysdev/scom.o
> arch/powerpc/sysdev/scom.c: In function 'scom_debug_init':
> arch/powerpc/sysdev/scom.c:182:36: error: 'powerpc_debugfs_root' undeclared (first use in this function)
> arch/powerpc/sysdev/scom.c:182:36: note: each undeclared identifier is reported only once for each function it appears in
> make[2]: *** [arch/powerpc/sysdev/scom.o] Error 1
> make[1]: *** [arch/powerpc/sysdev/scom.o] Error 2
> 
> A bisect leads to commit 9ffc93f203c18a70623f21950f1dd473c9ec48cd
> 
>     "Remove all #inclusions of asm/system.h"
> 
> Add the debug header which contains powerpc_debugfs_root.
> 
> Cc: David Howells <dhowells at redhat.com>
> Signed-off-by: Paul Gortmaker <paul.gortmaker at windriver.com>

Acked-by: David Howells <dhowells at redhat.com>