[U-Boot] [U-Boot, v4, 03/20] usb: ehci-mx6: Make regulator DM_REGULATOR dependent

[sbabic at denx.de]

> Do the regulator related work only if the build has the DM_REGULATOR.
> Signed-off-by: Abel Vesa <abel.vesa at nxp.com>
> Reviewed-by: Peng Fan <peng.fan at nxp.com>
> Reviewed-by: Fabio Estevam <festevam at gmail.com>
> Reviewed-by: Lukasz Majewski <lukma at denx.de>

Applied to u-boot-imx, master, thanks !

Best regards,
Stefano Babic

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