[V6 1/2] phy: ralink-usb: add driver for Mediatek/Ralink

[kbuild test robot]

Hi John,

[auto build test ERROR on phy/next]
[also build test ERROR on v4.13-rc5 next-20170817]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Harvey-Hunt/phy-ralink-usb-add-driver-for-Mediatek-Ralink/20170817-212130
base:   https://git.kernel.org/pub/scm/linux/kernel/git/kishon/linux-phy.git next
config: mips-allyesconfig (attached as .config)
compiler: mips-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=mips 

All errors (new ones prefixed by >>):

   drivers/phy/phy-ralink-usb.o: In function `ralink_usb_phy_power_off':
>> phy-ralink-usb.c:(.text+0x1c): undefined reference to `rt_sysc_membase'
   phy-ralink-usb.c:(.text+0x24): undefined reference to `rt_sysc_membase'
   drivers/phy/phy-ralink-usb.o: In function `ralink_usb_phy_power_on':
   phy-ralink-usb.c:(.text+0x84): undefined reference to `rt_sysc_membase'
   phy-ralink-usb.c:(.text+0x8c): undefined reference to `rt_sysc_membase'
   phy-ralink-usb.c:(.text+0xdc): undefined reference to `rt_sysc_membase'
   drivers/phy/phy-ralink-usb.o:phy-ralink-usb.c:(.text+0x1c4): more undefined references to `rt_sysc_membase' follow

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
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