OMAP2420, 2430 and 3xxx were using the OMAP4 end address
that unfortunately is not located at the same base address.
Moreover the OMAP4 size was set to 256 instead of 4096.

Change all .pa_end to set them to .pa_start + 0xfff

Cc: "G, Manjunath Kondaiah" <manjugk@ti.com>
Cc: Benoit Cousson <b-cousson@ti.com>
Reported-by: NMichael Fillinger <m-fillinger@ti.com>
Signed-off-by: NBenoit Cousson <b-cousson@ti.com>
Signed-off-by: NPaul Walmsley <paul@pwsan.com>