reset: imx7: add 'depends on HAS_IOMEM' to fix unmet dependency
This config select's MFD_SYSCON, but does not depend on HAS_IOMEM.
Compile testing on architecture without HAS_IOMEM causes "unmet
direct dependencies" in Kconfig phase.
Detected by "make ARCH=score allyesconfig".
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Masahiro Yamada