ARM: OMAP2+: hwmod: ensure that SYSCONFIG bits are reprogrammed after a reset

Move the code that reprograms the OCP_SYSCONFIG bits into the _reset()
function to ensure that it is called after every reset.  The code was
previously in the _setup() function.  So, before this patch, if
_reset() was called from another function, the SYSCONFIG register
won't be reprogrammed.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Benoît Cousson <b-cousson@ti.com>