CVE-2022-50390 drm/ttm: fix undefined behavior in bit shift for TTM_TT_FLAG_PRIV_POPULATED

In the Linux kernel, the following vulnerability has been resolved: drm/ttm: fix undefined behavior in bit shift for TTMTTFLAGPRIVPOPULATED Shifting signed 32-bit value by 31 bits is undefined, so changing significant bit to unsigned. The UBSAN warning calltrace like below: UBSAN:...