[PATCH] mach-bcm SMC: address clang inline asm incompatibility

[Russell King - ARM Linux]

On Tue, Jul 01, 2014 at 07:05:39AM -0500, Alex Elder wrote:
> My GCC-based build environment likes to call register r12 by the
> name "ip" in inline asm.  Behan Webster informed me that his Clang-
> based build environment likes "r12" instead.

Two objections, one of which is an acceptable outcome:
1. Why can't clang just learn these alternative names?
2. Why can't we just use "r12" here?

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