irqchip/tegra: Fix sparse warnings on __iomem

Fix the following warnings from sparse due to casting to/from __iomem
annotated variables:

drivers/irqchip/irq-tegra.c:93:31: warning: incorrect type in initializer (different address spaces)
drivers/irqchip/irq-tegra.c:93:31:    expected void [noderef] <asn:2>*base
drivers/irqchip/irq-tegra.c:93:31:    got void *chip_data
drivers/irqchip/irq-tegra.c:93:31: warning: incorrect type in initializer (different address spaces)
drivers/irqchip/irq-tegra.c:93:31:    expected void [noderef] <asn:2>*base
drivers/irqchip/irq-tegra.c:93:31:    got void *chip_data
drivers/irqchip/irq-tegra.c:93:31: warning: incorrect type in initializer (different address spaces)
drivers/irqchip/irq-tegra.c:93:31:    expected void [noderef] <asn:2>*base
drivers/irqchip/irq-tegra.c:93:31:    got void *chip_data
drivers/irqchip/irq-tegra.c:93:31: warning: incorrect type in initializer (different address spaces)
drivers/irqchip/irq-tegra.c:93:31:    expected void [noderef] <asn:2>*base
drivers/irqchip/irq-tegra.c:93:31:    got void *chip_data
drivers/irqchip/irq-tegra.c:269:57: warning: incorrect type in argument 5 (different address spaces)
drivers/irqchip/irq-tegra.c:269:57:    expected void *chip_data
drivers/irqchip/irq-tegra.c:269:57:    got void [noderef] <asn:2>*<noident>

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Acked-by: Thierry Reding <treding@nvidia.com>
Link: https://lkml.kernel.org/r/1465302292-4840-1-git-send-email-ben.dooks@codethink.co.uk
Signed-off-by: Jason Cooper <jason@lakedaemon.net>

drivers/irqchip/irq-tegra.c

@@ -90,7 +90,7 @@ static struct tegra_ictlr_info *lic;
 
 static inline void tegra_ictlr_write_mask(struct irq_data *d, unsigned long reg)
 {
-	void __iomem *base = d->chip_data;
+	void __iomem *base = (void __iomem __force *)d->chip_data;
 	u32 mask;
 
 	mask = BIT(d->hwirq % 32);
@@ -266,7 +266,7 @@ static int tegra_ictlr_domain_alloc(struct irq_domain *domain,
 
 		irq_domain_set_hwirq_and_chip(domain, virq + i, hwirq + i,
 					      &tegra_ictlr_chip,
-					      info->base[ictlr]);
+					      (void __force *)info->base[ictlr]);
 	}
 
 	parent_fwspec = *fwspec;