TI PHY: Add support to control 2nd USB PHY in DRA7xx/AM57xx

Added support to power on/power off the second USB PHY present in
DRA7xx and AM57xx.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
1 file changed