ARM: dts: omap5: Update UART with address space and interrupts

Add base address and interrupt line inside Device Tree data for
OMAP5.

Fix as well the wrong compatible string on UART5 & 6.

Signed-off-by: Sebastien Guiriec <s-guiriec@ti.com>
Reviewed-by: Shubhrajyoti D <shubhrajyoti@ti.com>
[b-cousson@ti.com: Update the changelog to reflect the fixes
done in the patch]
Signed-off-by: Benoit Cousson <b-cousson@ti.com>