[PATCH v3 2/3] usb: ehci: mxs: Use regulator_set_enable_if_allowed()

[sbabic at denx.de]

> From: Fabio Estevam <festevam at denx.de>
> Since commit 4fcba5d556b4 ("regulator: implement basic reference
> counter") the return value of regulator_set_enable() may be EALREADY or
> EBUSY for fixed/GPIO regulators.
> Switch to using the more relaxed regulator_set_enable_if_allowed() to
> continue if regulator already was enabled or disabled.
> This fixes the following error when running the 'ums' command:
> => ums 0 mmc 0
> UMS: LUN 0, dev mmc 0, hwpart 0, sector 0x0, count 0xece000
> Error enabling VBUS supply
> g_dnl_register: failed!, error: -114
> g_dnl_register failed
> Signed-off-by: Fabio Estevam <festevam at denx.de>
> Reviewed-by: Marek Vasut <marex at denx.de>
Applied to u-boot-imx, master, thanks !

Best regards,
Stefano Babic

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