ARM: imx5: tzic_init_irq() can directly be .init_irq hook

After i.MX51 supports DT only, tzic_init_irq() can figure out the
tzic_base on its own.  Thus, it can directly be .init_irq hook, and
mx51[53]_init_irq() can be saved.

Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
diff --git a/arch/arm/mach-imx/common.h b/arch/arm/mach-imx/common.h
index cf9e9c2..6d018c0 100644
--- a/arch/arm/mach-imx/common.h
+++ b/arch/arm/mach-imx/common.h
@@ -37,15 +37,13 @@
 void imx51_init_early(void);
 void imx53_init_early(void);
 void mxc_init_irq(void __iomem *);
-void tzic_init_irq(void __iomem *);
+void tzic_init_irq(void);
 void mx1_init_irq(void);
 void mx21_init_irq(void);
 void mx25_init_irq(void);
 void mx27_init_irq(void);
 void mx31_init_irq(void);
 void mx35_init_irq(void);
-void mx51_init_irq(void);
-void mx53_init_irq(void);
 void imx1_soc_init(void);
 void imx21_soc_init(void);
 void imx25_soc_init(void);