remoteproc: guard wc-ioremap helpers with HAS_IOMEM

The common wc-ioremap carveout callbacks live in
remoteproc_internal.h, which is included by the remoteproc core.
This means the helper bodies are parsed even for builds that do not
enable any platform driver using those callbacks.

On s390, CONFIG_HAS_IOMEM and CONFIG_GENERIC_IOREMAP depend on
CONFIG_PCI. A randconfig with CONFIG_REMOTEPROC=y and CONFIG_PCI=n
therefore has no usable ioremap_wc() or iounmap() declarations, and
fails to build the common remoteproc objects with implicit declarations
from the helper bodies.

Only include linux/io.h and build the real wc-ioremap helpers when
CONFIG_HAS_IOMEM is enabled. Provide no-IOMEM stubs so the internal
header remains self-contained for randconfig and COMPILE_TEST coverage.

Fixes: 50227acbf4e5 ("remoteproc: Add common wc-ioremap carveout callbacks")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202606301559.w8eorNQ2-lkp@intel.com/
Signed-off-by: Ben Levinsky <ben.levinsky@amd.com>

Link: https://lore.kernel.org/r/20260630174056.667646-1-ben.levinsky@amd.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>

0 files changed, 0 insertions, 0 deletions