powerpc/powernv: Squash sparse warnings in opal-call.c

[Michael Ellerman]

On Thu, 2019-03-14 at 04:27:27 UTC, Andrew Donnellan wrote:
> sparse complains a lot about opal-call.c:
> 
>   arch/powerpc/platforms/powernv/opal-call.c:128:1: warning: symbol 'opal_invalid_call' was not declared. Should it be static?
>   arch/powerpc/platforms/powernv/opal-call.c:129:1: warning: symbol 'opal_console_write' was not declared. Should it be static?
>   arch/powerpc/platforms/powernv/opal-call.c:130:1: warning: symbol 'opal_console_read' was not declared. Should it be static?
> 
> Those symbols are forward declared in opal.h, but we can't include that
> because the function signatures in opal.h are different. So instead, just
> add an extra forward declaration to the OPAL_CALL macro to shut sparse up.
> 
> Signed-off-by: Andrew Donnellan <andrew.donnellan at au1.ibm.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/2f9196b67237f1e59f2753b2968f8ad6

cheers