phy: ingenic: depend on HAS_IOMEM

The driver uses devm_ioremap_resource() which will not be built if
CONFIG_HAS_IOMEM is not selected, so add depends on it to fix the build
failure on few archs

s390-linux-ld: drivers/phy/ingenic/phy-ingenic-usb.o: in function `ingenic_usb_phy_probe':
>> phy-ingenic-usb.c:(.text+0xb66): undefined reference to `devm_platform_ioremap_resource'

Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/r/20201208045300.3637026-1-vkoul@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>

PHY: Ingenic: Add USB PHY driver using generic PHY framework.

Used the generic PHY framework API to create the PHY, this driver
supoorts USB OTG PHY used in JZ4770 SoC, JZ4775 SoC, JZ4780 SoC,
X1000 SoC, X1830 SoC and X2000 SoC.

Co-developed-by: 漆鹏振 (Qi Pengzhen) <aric.pzqi@ingenic.com>
Signed-off-by: 漆鹏振 (Qi Pengzhen) <aric.pzqi@ingenic.com>
Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
Tested-by: 周正 (Zhou Zheng) <sernia.zhou@foxmail.com>
Tested-by: H. Nikolaus Schaller <hns@goldelico.com>
Reviewed-by: Paul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/20201116141906.11758-4-zhouyanjie@wanyeetech.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>