ARM: OMAP3: Fix 3430SDP defconfig

ARM: OMAP3: Fix 3430SDP defconfig

The mainline merge of the 3430SDP support (commit 6fdc29e2)
seems to have messed up the 3430 defconfig completely.

Update the defconfig using a known good version
(SDP defconfig from v2.6.26-omap2 and current beagle defconfig)
as reference.

The image size is now 1.9 MB down from 2.4 MB earlier, and
the number of modules is 8, down from 203. Build time also
scales proportionally.

Other support (OneNAND, etc) can be enabled as needed.

Signed-off-by: Anand Gadiyar <gadiyar@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>