ion: fix printk warnings

Use %z for size_t and %pa for dma_addr_t to avoid warnings in printks.

Change-Id: I2c72874acd0b69cb35fca691928783817deb9394
Signed-off-by: Colin Cross <ccross@android.com>
Git-commit: 21e08b49ac311e3d1e9c7168de1bd42868176398
Git-repo: http://android.googlesource.com/kernel/common/


[mitchelh@codeaurora.org: we already had most of these right, so this
 turned out to be pretty minimal compared to the original patch.]
Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org>