irqchip/digicolor: Drop unnecessary static

Drop static on a local variable, when the variable is initialized before
any possible use.  Thus, the static has no benefit.

The semantic patch that fixes this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@bad exists@
position p;
identifier x;
type T;
@@
static T x@p;
...
x = <+...x...+>

@@
identifier x;
expression e;
type T;
position p != bad.p;
@@
-static
 T x@p;
 ... when != x
     when strict
?x = e;
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Baruch Siach <baruch@tkos.co.il>
Cc: keescook@chromium.org
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: kernel-janitors@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: Jason Cooper <jason@lakedaemon.net>
Link: http://lkml.kernel.org/r/1500149266-32357-11-git-send-email-Julia.Lawall@lip6.fr

drivers/irqchip/irq-digicolor.c

@@ -71,7 +71,7 @@ static void __init digicolor_set_gc(void __iomem *reg_base, unsigned irq_base,
 static int __init digicolor_of_init(struct device_node *node,
 				struct device_node *parent)
 {
-	static void __iomem *reg_base;
+	void __iomem *reg_base;
 	unsigned int clr = IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN;
 	struct regmap *ucregs;
 	int ret;