gpu: ion: Only map as much of the vma as the user requested
gpu: ion: Only map as much of the vma as the user requested

Change-Id: I62f60cb195b1be6655a3dbb518966e6bae94cb42
Signed-off-by: Rebecca Schultz Zavin <0ab09b420c3f4f686e1f6503c93d3111d2038689@android.com>
Git-commit: d1d2e536b1920ff7c2fe1a5a8967fe7075a85e71
Git-repo: https://android.googlesource.com/kernel/common
Signed-off-by: Laura Abbott <e7b4910f4742918f5926c991d8a2cd122ac7e295@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