ARM: tegra: Make variables static

No need to be public. Checked with:
  $ touch arch/arm/mach-tegra/*[ch] && make C=1

Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
diff --git a/arch/arm/mach-tegra/apbio.c b/arch/arm/mach-tegra/apbio.c
index d091675..d7aa52e 100644
--- a/arch/arm/mach-tegra/apbio.c
+++ b/arch/arm/mach-tegra/apbio.c
@@ -38,7 +38,7 @@
 static struct dma_chan *tegra_apb_dma_chan;
 static struct dma_slave_config dma_sconfig;
 
-bool tegra_apb_dma_init(void)
+static bool tegra_apb_dma_init(void)
 {
 	dma_cap_mask_t mask;