omap4: hwmod: Enable the keypad

Commit 407a6888 (OMAP4: hwmod data:
Add AESS, McPDM, bandgap, counter_32k, MMC, KBD, ISS & IPU) added the
entry for keypad, but did not enable it.

Enable the keypad in the hwmod database so it works.

Signed-off-by: Shubhrajyoti <D&lt;shubhrajyoti@ti.com>
Acked-by: Benoit <Cousson&lt;b-cousson@ti.com>
[tony@atomide.com: updated comments]
Signed-off-by: Tony Lindgren <tony@atomide.com>