Use hsa header files from /opt/rocm-ver/include rather than using wrapper files from /opt/rocm-ver/hsa/include/hsa
Change-Id: Id7a9bde19447cd2a0fd6e03b11c08471f09c2a46
Compiled using Clang and encountered errors on ambiguous pointer
type, implicit conversion NULL to bool, and unused function, etc.
As a fix, this patch slightly updates the related codes.
Change-Id: I4a73d66293313dda36749036f5c73aaf2a445231