phy: add 'depends on HAS_IOMEM' to fix unmet dependency

These configs select MFD_SYSCON, but do 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 <[e-mail]>
Signed-off-by: Kishon Vijay Abraham I <[e-mail]>

drivers/phy/hisilicon/Kconfig

···
 config PHY_HI6220_USB
 	tristate "hi6220 USB PHY support"
 	depends on (ARCH_HISI && ARM64) || COMPILE_TEST
+	depends on HAS_IOMEM
 	select GENERIC_PHY
 	select MFD_SYSCON
 	help

drivers/phy/ralink/Kconfig

···
 config PHY_RALINK_USB
 	tristate "Ralink USB PHY driver"
 	depends on RALINK || COMPILE_TEST
+	depends on HAS_IOMEM
 	select GENERIC_PHY
 	select MFD_SYSCON
 	help

drivers/phy/rockchip/Kconfig

···
 config PHY_ROCKCHIP_PCIE
 	tristate "Rockchip PCIe PHY Driver"
 	depends on (ARCH_ROCKCHIP && OF) || COMPILE_TEST
+	depends on HAS_IOMEM
 	select GENERIC_PHY
 	select MFD_SYSCON
 	help