arm/dt: 8974: update ion heap sizes and definitions
arm/dt: 8974: update ion heap sizes and definitions

Remove obsolete ion heaps and update sizes of existing heaps.

Change-Id: I3d15b96c7cc39ad113aeb264650a00017c5b98c1
Signed-off-by: Mitchel Humpherys <5070267e141ca308fc855217ddbeaf20e729a7bf@codeaurora.org>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas