ARM: OMAP2+: hwmod: Add of_node_put() before break

Fix following coccicheck warning:
./arch/arm/mach-omap2/omap_hwmod.c:753:1-23: WARNING: Function
for_each_matching_node should have of_node_put() before break

Early exits from for_each_matching_node should decrement the
node reference counter.

Signed-off-by: Wan Jiabing <wanjiabing@vivo.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>