Dimitry Andric 27e644a80b Fix undefined behaviour in several gpio_pin_setflags() routines (under
sys/arm and sys/mips), squelching the clang 3.3 warnings about this.

Noticed by:	tinderbox and many irate spectators
Submitted by:	Luiz Otavio O Souza <loos.br@gmail.com>
PR:		kern/177759
MFC after:	3 days
2013-04-13 21:21:13 +00:00
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