omap3630: Configure HSMMC1 to 4-bit

The HSMMC1 controller on omap3630 supprts only 4-bit mode. If cpu
is 3630 configure HSMMC1 wires to 4-bit.

Signed-off-by: Madhusudhan Chikkature <madhu.cr@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>