usb: phy: rename <linux/usb/usb_phy_gen_xceiv.h> to <linux/usb/usb_phy_generic.h>

now that all functions match the driver name,
the only missing piece is to rename the header
file itself.

Signed-off-by: Felipe Balbi <balbi@ti.com>

arch/arm/mach-omap2/board-omap3beagle.c

@@ -33,7 +33,6 @@
 #include <linux/mtd/nand.h>
 #include <linux/mmc/host.h>
 #include <linux/usb/phy.h>
-#include <linux/usb/usb_phy_gen_xceiv.h>
 
 #include <linux/regulator/machine.h>
 #include <linux/i2c/twl.h>