Changes the return type of fdt_usb_get_node_type from char* to int

Signed-off-by: Sriram Dash <sriram.dash@nxp.com>
Signed-off-by: Rajesh Bhagat <rajesh.bhagat@nxp.com>

Enables usb device-tree fixup code to incorporate xhci controller

Signed-off-by: Ramneek Mehresh <ramneek.mehresh@nxp.com>
Signed-off-by: Sriram Dash <sriram.dash@nxp.com>

Call fdt_usb_get_node_type() from fdt_fixup_usb_mode_phy_type() to
avoid code duplication.

Signed-off-by: Sriram Dash <sriram.dash@nxp.com>
Signed-off-by: Rajesh Bhagat <rajesh.bhagat@nxp.com>
Acked-by: Marek Vasut <marex@denx.de>

Move usb device-tree fixup framework from ehci-fsl.c to common place so
that it can be used by other drivers as well (xhci-fsl.c).

Signed-off-by: Ramneek Mehresh <ramneek.mehresh@nxp.com>
Signed-off-by: Sriram Dash <sriram.dash@nxp.com>
Acked-by: Marek Vasut <marex@denx.de>