After investigating a bit i have found where the bcm2708_usb control is named and located now:
"...
[root@aquarius ~]# dmesg | grep dwc_otg
[ 3.547733] dwc_otg: version 3.00a 10-AUG-2012 (platform bus)
[ 4.003172] WARN::dwc_otg_hcd_init:1047: FIQ DMA bounce buffers: virt = 0xbac14000 dma = 0xfac14000 len=9024
[ 4.038677] dwc_otg: Microframe scheduler enabled
[ 4.061349] dwc_otg 3f980000.usb: DWC OTG Controller
[ 4.067809] dwc_otg 3f980000.usb: new USB bus registered, assigned bus number 1
[ 4.076709] dwc_otg 3f980000.usb: irq 32, io mem 0x00000000
[ 4.117537] usb usb1: Manufacturer: Linux 4.0.6-1-ARCH dwc_otg_hcd
[ 4.143404] dwc_otg: FIQ enabled
[ 4.143418] dwc_otg: NAK holdoff enabled
[ 4.143428] dwc_otg: FIQ split-transaction FSM enabled
[root@aquarius ~]# find /sys/ -name "3f980000.usb"
/sys/bus/platform/devices/3f980000.usb
/sys/bus/platform/drivers/dwc_otg/3f980000.usb
/sys/devices/platform/soc/3f980000.usb
[root@aquarius ~]# ls /sys/devices/platform/soc/3f980000.usb
busconnected disconnect_us fr_interval gotgctl guid hnp hsic_connect mode_ch_tim_en regoffset spramdump uevent
buspower driver gadget gpvndctl gusbcfg hnpcapable inv_sel_hsic pools regvalue srp usb1
bussuspend driver_override ggpio grxfsiz hcd_frrem hprt0 modalias rd_reg_test rem_wakeup_pwrdn srpcapable wr_reg_test
devspeed enumspeed gnptxfsiz gsnpsid hcddump hptxfsiz mode regdump remote_wakeup subsystem
..."So from now on this is a good way to locate it:
find /sys/devices/ -name `dmesg -t | grep dwc_otg | grep "DWC OTG Controller" | awk '{print $2}' | cut -d":" -f1`I hope this would help who ever needs it