In omap4_enable_all_clocks we not only enable the mcbsp clocks, but also
change the source from ABE_24M_FCLK to 24M_FCLK. Revert this and default
to the reset state.
Signed-off-by: Jan Weitzel <j.weitzel@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>