OMAP4: ID: Add runtime detection of 4470 1.5Ghz silicon

STD_FUSE_PROD_ID_1[17:16] fuse determines silicon type:
0x1 - Standard performance (1.3 GHz)
0x2 - High performance (1.5 GHz)

Change-Id: I7e37daf1d214d63b35f10fa45952485c59cbc009
Signed-off-by: Leonid Iziumtsev <x0153368@ti.com>
OMAP4: Add 4430 ES2.3 chip is check

4430 ES2.3 chip is check was missed during the merge
phase.

Putting it back in

Change-Id: I94fa2b8f803acb2a13c2f7db4558b2864106d213
Signed-off-by: Dan Murphy <dmurphy@ti.com>