msm: kgsl: Return error code when ION setup fails

ion_import_dma_buf() can return a NULL without an error code. Detect
this condition & return a -EINVAL as error.

Change-Id: I18d058fd374a8d00c00bb943f496f446c9f1c90d
Signed-off-by: Ranjhith Kalisamy <ranjhith@codeaurora.org>
1 file changed