treewide: replace obsolete _refok by __ref

There was only one use of __initdata_refok and __exit_refok

__init_refok was used 46 times against 82 for __ref.

Those definitions are obsolete since commit 312b1485fb50 ("Introduce new
section reference annotations tags: __ref, __refdata, __refconst")

This patch removes the following compatibility definitions and replaces
them treewide.

/* compatibility defines */
#define __init_refok     __ref
#define __initdata_refok __refdata
#define __exit_refok     __ref

I can also provide separate patches if necessary.
(One patch per tree and check in 1 month or 2 to remove old definitions)

[akpm@linux-foundation.org: coding-style fixes]
Link: http://lkml.kernel.org/r/1466796271-3043-1-git-send-email-fabf@skynet.be
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index b108f13..4305ee9 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -309,7 +309,7 @@
  * During early init (when acpi_gbl_permanent_mmap has not been set yet) this
  * routine simply calls __acpi_map_table() to get the job done.
  */
-void __iomem *__init_refok
+void __iomem *__ref
 acpi_os_map_iomem(acpi_physical_address phys, acpi_size size)
 {
 	struct acpi_ioremap *map;
@@ -362,8 +362,7 @@
 }
 EXPORT_SYMBOL_GPL(acpi_os_map_iomem);
 
-void *__init_refok
-acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
+void *__ref acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
 {
 	return (void *)acpi_os_map_iomem(phys, size);
 }