DMA: shdma: Fix warnings due to declared but unused symbols
Several functions and variables are use on SH_CPU4 or ARM only. Guard their declaration with conditional compilation directives to avoid warnings. Cc: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com> Cc: Vinod Koul <vinod.koul@intel.com> Cc: dmaengine@vger.kernel.org Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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