ASoC: samsung: remove unneeded ret variable

Return value from io_remap_pfn_range() directly instead
of taking this in another redundant variable.
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
Signed-off-by: CGEL ZTE <cgel.zte@gmail.com>
Link: https://lore.kernel.org/r/20220117110357.863990-1-chi.minghao@zte.com.cnSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/samsung/idma.c

@@ -244,17 +244,14 @@ static int idma_mmap(struct snd_soc_component *component,
 {
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	unsigned long size, offset;
-	int ret;
 
 	/* From snd_pcm_lib_mmap_iomem */
 	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 	size = vma->vm_end - vma->vm_start;
 	offset = vma->vm_pgoff << PAGE_SHIFT;
-	ret = io_remap_pfn_range(vma, vma->vm_start,
+	return io_remap_pfn_range(vma, vma->vm_start,
 			(runtime->dma_addr + offset) >> PAGE_SHIFT,
 			size, vma->vm_page_prot);
-
-	return ret;
 }
 
 static irqreturn_t iis_irq(int irqno, void *dev_id)