[PATCH v2 REPOST 4/4] ARM: OMAP2+: dmtimer: cleanup fclk usage

* Tarun Kanti DebBarma [off-list ref] [120705 05:45]:

With omap_hwmod_get_main_clk() now available, this can be passed to
clk_get() to extract the fclk and thus avoid construction of fclk name.
Corrected the timer fck name mis-match between clock44xx_data.c and
omap_hwmod_44xx_data.c. For other platforms this is already taken care.

Thanks applying into cleanup-part2 branch.

Tony