sh: convert nommu io{re,un}map() to static inline functions

stable inclusion
from stable-v5.10.132
commit 41007669fc3b4c968c54b81088c2bbc18d8affe4
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5YS3T

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=41007669fc3b4c968c54b81088c2bbc18d8affe4

--------------------------------

commit d684e0a5 upstream.

Recently, nommu iounmap() was converted from a static inline function to a
macro again, basically reverting commit 4580ba4a ("sh: Convert
iounmap() macros to inline functions").  With -Werror, this leads to build
failures like:

    drivers/iio/adc/xilinx-ams.c: In function `ams_iounmap_ps':
    drivers/iio/adc/xilinx-ams.c:1195:14: error: unused variable `ams' [-Werror=unused-variable]
     1195 |  struct ams *ams = data;
	  |              ^~~

Fix this by replacing the macros for ioremap() and iounmap() by static
inline functions, based on <asm-generic/io.h>.

Link: https://lkml.kernel.org/r/8d1b1766260961799b04035e7bc39a7f59729f72.1655708312.git.geert+renesas@glider.be


Fixes: 13f1fc87 ("sh: move the ioremap implementation out of line")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>
Acked-by: Xie XiuQi <xiexiuqi@huawei.com>