OMAP: hwmod: Do not exit the iteration if one clock init failed

During the _init_clocks phase, the iteration is stopped but the
status is still change from _HWMOD_STATE_REGISTERED to
_HWMOD_STATE_CLKS_INITED.
Since the _setup phase will be done nevertheless, it might be
better to keep initializing the others clocks nodes and just
keep the warning.
It is much easier to debug when a important number of clocks
name are wrong during the early debug phase of a new platform.

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