OMAP2+: hwmod data: Fix wrong dma_system end address

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: Michael Fillinger <m-fillinger@ti.com>
Signed-off-by: Benoit Cousson <b-cousson@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>