ARM: AM33XX: hwmod: Add hwmod data for debugSS

In the original hwmod data file, DebugSS entry was disabled,
since we didn't (and do not) have SW to control it.

This patch enables it back with right data, as now we will
have control through command line argument "omap_debugss_en".

Signed-off-by: Vaibhav Hiremath <hvaibhav@ti.com>
Cc: Kevin Hilman <khilman@linaro.org>
Cc: Paul Walmsley <paul@pwsan.com>
Cc: Tony Lindgren <tony@atomide.com>
ARM: OMAP2+: Add command line parameter for debugSS module control

Currently there is no clean mechanism to control debugSS module and
you have to always keep clocks enabled, either,

    - By enabling it during boot as part of clk_init function.
    Or
    - By having HWMOD_INIT_NO_IDLE flag in hwmod data.

Based on the discussion,
http://www.mail-archive.com/linux-omap@vger.kernel.org/msg81771.html

This patch introduces new kernel parameter "omap_debugss_en",
which will allow user to control debugSS module enable/disable
part during boot-time.

Signed-off-by: Vaibhav Hiremath <hvaibhav@ti.com>
Cc: Kevin Hilman <khilman@linaro.org>
Cc: Paul Walmsley <paul@pwsan.com>
Cc: Tony Lindgren <tony@atomide.com>

Tested on
	- AM335x based EVM and BeagleBone platforms