Revert "OMAP4: early mux initialization for EHCI"

This reverts commit 5a2e0ba0863d099bbb454a303e8927b54d4f22bf.

Reverted commit does USB Host muxes initialization too early.
In case of HSIC connection, this generates IDLE state on the
line before USB Host initialization. But HSIC Device generates
CONNECT on the bus as soon as detects IDLE. However, since USB Host
is initialized later, it misses this event.

Change-Id: I90219bce6d55bc828ea5b76f6cf9efa272f28e0b
Signed-off-by: Ruslan Bilovol <ruslan.bilovol@ti.com>