memory: ti-emif-pm: Fix cast to iomem pointer

Cast pointer to iomem memory properly to fix sparse warning:

    drivers/memory/ti-emif-pm.c:251:38: warning: incorrect type in argument 1 (different address spaces)
    drivers/memory/ti-emif-pm.c:251:38:    expected void const volatile [noderef] __iomem *addr
    drivers/memory/ti-emif-pm.c:251:38:    got void *
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

drivers/memory/ti-emif-pm.c

@@ -248,7 +248,7 @@ MODULE_DEVICE_TABLE(of, ti_emif_of_match);
 static int ti_emif_resume(struct device *dev)
 {
 	unsigned long tmp =
-			__raw_readl((void *)emif_instance->ti_emif_sram_virt);
+			__raw_readl((void __iomem *)emif_instance->ti_emif_sram_virt);
 
 	/*
 	 * Check to see if what we are copying is already present in the