of: fix declaration of of_io_request_and_map

We are having build failure with linux-next for sparc allmodconfig with
the error messages:

drivers/built-in.o: In function `meson6_timer_init':
meson6_timer.c:(.init.text+0x5fe8): undefined reference to `of_io_request_and_map'
drivers/built-in.o: In function `mtk_timer_init':
mtk_timer.c:(.init.text+0x6af0): undefined reference to `of_io_request_and_map'
drivers/built-in.o: In function `asm9260_timer_init':
asm9260_timer.c:(.init.text+0x6c48): undefined reference to `of_io_request_and_map'

CONFIG_OF is defined for sparc so it is expected that we have a
definition of of_io_request_and_map() but of/address.c is only compiled
if it is !SPARC. In other words, CONFIG_OF_ADDRESS is not defined for
sparc so we get the build failure.

Fixes: e572f844ca66 ("clocksource/drivers/meson6: Add the COMPILE_TEST option")
Fixes: bec8c4617611 ("clocksource/drivers/mediatek: Add the COMPILE_TEST option")
Fixes: 4a373b45f94a ("clocksource/drivers/asm9260: Add the COMPILE_TEST option")
Acked-by: Daniel Lezcano <[e-mail]>
Signed-off-by: Sudip Mukherjee <[e-mail]>
[robh: move include of io.h out of ifdef's]
Signed-off-by: Rob Herring <[e-mail]>

include/linux/of_address.h

···
 #include <linux/ioport.h>
 #include <linux/errno.h>
 #include <linux/of.h>
+#include <linux/io.h>
 
 struct of_pci_range_parser {
 	struct device_node *node;
···
 					const struct of_device_id *matches,
 					u64 base_address);
 extern void __iomem *of_iomap(struct device_node *device, int index);
+void __iomem *of_io_request_and_map(struct device_node *device,
+				    int index, const char *name);
 
 /* Extract an address from a device, returns the region size and
  * the address space flags too. The PCI version uses a BAR number
···
 				u64 *paddr, u64 *size);
 extern bool of_dma_is_coherent(struct device_node *np);
 #else /* CONFIG_OF_ADDRESS */
+static inline void __iomem *of_io_request_and_map(struct device_node *device,
+						  int index, const char *name)
+{
+	return IOMEM_ERR_PTR(-EINVAL);
+}
 
 static inline u64 of_translate_address(struct device_node *np,
 				       const __be32 *addr)
···
 extern int of_address_to_resource(struct device_node *dev, int index,
 				  struct resource *r);
 void __iomem *of_iomap(struct device_node *node, int index);
-void __iomem *of_io_request_and_map(struct device_node *device,
-					int index, const char *name);
 #else
-
-#include <linux/io.h>
-
 static inline int of_address_to_resource(struct device_node *dev, int index,
 					 struct resource *r)
 {
···
 static inline void __iomem *of_iomap(struct device_node *device, int index)
 {
 	return NULL;
-}
-
-static inline void __iomem *of_io_request_and_map(struct device_node *device,
-					int index, const char *name)
-{
-	return IOMEM_ERR_PTR(-EINVAL);
 }
 #endif