usb: phy: snps: Enable autoresume for FS/HS peripherals only

Currently the driver enables autoresume for all the connected
peripherals. In a case where an LS device is connected but fails
the enumeration, this autoresume enablement is leading to PHY
keeping the Dm pulled up even when the peripheral is detached.
Hence, the detach hs_phy_irq is never fired and disconnect is
not processed.
Since remote wakeup from LS peripherals is not a requirement on
our platforms, enable autoresume for FS/HS devices only.

Change-Id: I0a62d08e58af18b523af322c64529f5183d55907
Signed-off-by: Ajay Agarwal <ajaya@codeaurora.org>