In the previous version of devicetree, reserved area for wakeup
R5F was stating from 0x9db00000, so to provide compatibility
with older version of devicetree being used with new wakeup R5F
firmware, the wakeup R5F reserved area is reduced by 1Mb and that
1Mb is moved to MCU M4F reserved area.

Signed-off-by: Devarsh Thakkar <devarsht@ti.com>