msm: kgsl: Correctly expand memory flag masks to 64 bit

For legacy reasons some of the MEMFLAG bits and masks are not marked
as ULL in the user API and they end up getting applied incorrectly
when used as inverse masks in the driver. Cast to uint64_t directly
before using to avoid losing bits.

Change-Id: Ic0dedbad3aad81533cda73c2f72473b1f01f6d8d
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>